Follow Wednesday’s updates here: Austin bombing suspect dies after blowing himself up, police say 
 
 SCHERTZ, Tex. — The latest in a wave of bombings rattling Central Texas brought a widening investigation to this city outside San Antonio on Tuesday, after an explosion at a FedEx facility signaled that whoever was responsible for the attacks had offered police potentially critical new clues while again shifting tactics. 
 
 The blast early Tuesday — the fifth since March 2 — came as investigators have struggled to explain the bombing campaign that began with a series of packages placed at people’s doorsteps in eastern Austin, escalated to a tripwire-enabled device left along a residential street and, on Tuesday, shifted to an explosive device shipped through a delivery company. 
 
 The same person who shipped that explosive also sent another package that was intercepted before delivery and was turned over to the FBI, according to FedEx. Federal officials confirmed that package also contained an explosive device. 
 
 [After fourth Austin explosion, police warn of sophisticated ‘serial bomber’] 
 
 Police have described the unknown attacker as a “serial bomber” who has been showing increasing sophistication and skill. The explosions on Sunday and early Tuesday also suggested a worrisome — and unusual — willingness to change gears. 
 
 The bomb in Schertz exploded just after midnight while it traveled on an automated conveyor belt at a FedEx center about an hour south of Austin, the city that has been the focus of the blasts. One employee at the center said it caused ringing in her ears, but no one else was wounded, police said. 
 
 The package was en route to Austin, according to police, and officials said they think it was the work of the same person or people responsible for the four earlier explosions in the Texas capital. Michael Hansen, the Schertz police chief, said investigators are “confident that neither this facility nor any location in the Schertz area was the target.” 
 
 FedEx also said Tuesday that by using the delivery service, the person who shipped the packages left behind “extensive evidence,” which the company turned over to investigators. 
 
 “We have also confirmed that the individual responsible also shipped a second package that has now been secured and turned over to law enforcement,” FedEx said in a statement. “We are thankful that there were no serious injuries from this criminal activity. We have provided law enforcement responsible for this investigation extensive evidence related to these packages and the individual that shipped them collected from our advanced technology security systems.” 
 
 In a statement Tuesday evening, the Austin police, the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives confirmed that the package found in Austin that morning “contained an explosive device [that] was disrupted by law enforcement. No injuries were reported.” 
 
 As tension lingered in Austin, authorities raced Tuesday night to a reported explosion at a Goodwill store in the city’s southwest area, where a man in his 30s was thought to be injured. But police said later it was an incendiary device rather than an explosive. 
 
 Ely Reyes, an assistant chief with the Austin Police Department, said investigators have “no reason to believe” that the incident was connected to the four other explosions in Austin and the fifth in Schertz. 
 
 He said the “incendiary device” went off at the Goodwill store when an employee handled two old military devices left in a box of donated items. He described the devices as six-inch-long “artillery simulators.” When an employee picked one of them up, the device “initiated,” injuring the employee, who was taken to a hospital. Reyes said he is in stable condition. 
 
 [A century before Austin’s bombings, a deadly Wall Street explosion was never solved] 
 
 The hurried response to that blast spoke to the unease in Austin as officials waited to see if another explosive would emerge. Meanwhile, investigators were carefully examining the unexploded FedEx package, hoping it could provide new evidence pointing to a possible suspect. 
 
 The discovery of any unexploded device linked to the case could prove crucial for investigators, because it could lead to the identity of a suspect or suspects; the materials used to assemble a bomb potentially can be traced back to a supplier — and, in many cases, the individual purchaser. 
 
 The suspect “is not stupid. He’s being diversified in his methods and attacks, and may have done this before somewhere,’’ said Malcolm Brady, a retired ATF explosives investigator. But each new device — and delivery method — offers new potential leads, such as business records, video or other evidence. 
 
 “It’s a big jigsaw puzzle, and you put all the pieces of information together and go from there,” he said. 
 
 [A father, a musician, a salsa maker — the lives and futures lost in the Austin bombings] 
 
 Brian Manley, the interim Austin police chief, said his department had sent officers to Schertz to help investigate the “new development” there. 
 
 “The working theory right now … is that that was a package that was in the shipping center destined for Austin,” he told the Austin City Council on Tuesday morning. All four explosions in Austin have occurred outside the city’s core, which includes downtown, the Texas Capitol and the University of Texas. 
 
 San Antonio Police Chief William McManus had said, during a morning news briefing, that officials believed a second package found at the Schertz facility was “also loaded with an explosive device that they are working on right now.” A spokesman later issued a statement saying: “There is no secondary device at the Schertz facility.” 
 
 Finally, officials confirmed late Tuesday that a second package found in Austin had contained an undetonated bomb. 
 
 The confusion and contradictory statements underscored the frantic pace of the investigation, which now includes more than 300 federal agents along with scores of local law enforcement officers in Texas. 
 
 President Trump said Tuesday that the federal government is working “hand in hand” with local authorities to “get to the bottom” of the bombings in Austin and find those responsible. 
 
 The package that detonated early Tuesday morning is believed to have been sent from a FedEx location in Sunset Valley, an enclave city within Austin, police said. 
 
 “The FBI believes that the package that detonated in Schertz may have originated from here,” said Sunset Valley Police Lt. Rich Andreucci. 
 
 The police department cordoned off the FedEx storefront — located three miles from the site where a bomb, rigged with a tripwire, detonated Sunday night — but neighboring stores in the shopping center were open. 
 
 “The more we’re sitting here, the more we realize it’s serious,” said Jessica Wilkinson, who was celebrating her 37th birthday by having lunch outside with her sister and mother. “It’s just all over the place.” 
 
 A mother of two children, ages 8 and 4, Wilkinson said it’s been a scary time to live in Austin, “but it’s so random, it’s hard to change anything in my day-to-day life to avoid it.” 
 
 Her mother, Kellie Metzler, 59, said she thought about texting Wilkinson to say, “Don’t be scared; I sent a couple of packages for your birthday.” Metzler said she was infuriated by the seeming randomness of the bomber’s targets. 
 
 “Why pick on people you don’t even know?” Kellie Metzler said. “Not one of them did a thing to you. I just don’t get that.” 
 
 [Police said the first blast was “isolated,” then shifted gears when two more followed] 
 
 The first three bombs — one on March 2 and a pair that detonated March 12 — were in packages dropped off at people’s homes, authorities said. The fourth bomb was placed on the side of the road in a residential neighborhood and was rigged with a tripwire; when it detonated Sunday night, two men were wounded. 
 
 The first three explosives all detonated in eastern Austin, affecting areas where black and Hispanic residents live, leading to suggestions that they might have been motivated by racial bias. The explosion Sunday night detonated in an affluent, predominantly white neighborhood and injured two white men in their 20s. 
 
 Police and experts have pointed to the change in tactics as suggesting the proficiency of whoever is responsible. 
 
 “That bomb was very different from the other three,” Manley told the Austin City Council. “The first three appeared to be targeting a specific residence, resident address. And whether they were targeting the person at that address or not, we know they were placed on a specific doorstep at a specific home.” 
 
 The device Sunday night, by contrast, was seemingly intended to detonate at random, ratcheting up the fear in a city already unnerved by the package explosions. Police said Tuesday morning that they had received more than 1,200 calls about suspicious packages since March 12, the day two bombs detonated; one-third of the calls came in between Monday morning and Tuesday morning. 
 
 Berman, Barrett and Flynn reported from Washington. Matt Zapotosky, Brian Murphy, Julie Tate and Jenna Johnson in Washington contributed to this report, which has been updated. 
 
 Read more: 
 
 The unique terror of Austin’s deadly package bombs 
 
 Austin police search for bombing motive, say explosives made with ‘skill and sophistication’ 
 
 ‘Who did this and why?’: Austin remains tense after deadly bombings as police look for answers 

 6:40 p.m. update: FBI officials have confirmed a suspicious package found Tuesday morning at a FedEx ground facility in Southeast Austin contained an explosive device, according to a news release. 
 
 Officials also confirmed that the package, as well as another one that exploded at a FedEx in Schertz early Tuesday, are connected to the four previous package explosions in Austin this month. 
 
 In Tuesday’s incidents, one package exploded and the second one was detonated in a controlled manner by law enforcement at the Southeast Austin FedEx facility, FBI officials said. 
 
 The Schertz Police Department responded to a package explosion around 12:25 a.m. at a FedEx facility at 9935 Doerr Lane in the city of Schertz, near San Antonio. One person — an employee — was treated at the scene and released. The FBI and the Bureau of Alcohol, Tobacco and Firearms also responded and continue to process the scene for evidence. 
 
 Later that morning, around 6:19 a.m., Austin police received a call about a suspicious package at 4117 McKinney Falls Parkway in Austin. Austin police, along with the FBI and ATF, responded. 
 
 These officials “determined the package contained an explosive device and was disrupted by law enforcement,” the FBI said in a statement. No one was injured in this incident. 
 
 Officials are offering a reward of up to $100,000 for information that leads to the bomber’s arrest. Call 512-472-8477 or download the “P3 Tips” smartphone app to leave a tip. Tipsters can remain anonymous. 
 
 6 p.m. update: U.S. Rep. Michael McCaul, R-Austin, said federal authorities told him investigators have obtained surveillance videos that “could possibly” show a suspect in the bomb explosion at a FedEx ground facility in Schertz early Tuesday, the Associated Press reports. 
 
 
 
 McCaul, chairman of the U.S. House Homeland Security committee, told the AP he has been briefed by the FBI, ATF and Austin police. He did not say where the surveillance video was obtained from. 
 
 
 
 McCaul also said evidence from a suspicious package found at a FedEx ground facility near the Austin Bergstrom International Airport, which authorities believe to be a bomb, could be key in finding the bomber, the AP reports. 
 
 McCaul said he hopes the bomber's "biggest mistake was going through FedEx." 
 
 5:02 p.m. update: The suspicious package found at a FedEx ground facility at McKinney Falls Parkway, which authorities believe to be a bomb, was sent by the same person behind a bomb that exploded early Tuesday at a FedEx facility in Schertz, U.S. Rep Lloyd Doggett told the American-Statesman. 
 
 The package was also sent from the same FedEx Office store in Sunset Valley from where the Schertz was sent, Doggett said. 
 
 Doggett. D-Austin, would not say where the packages were destined or offer additional comments as to the investigation into the identity of the sender. 
 
 Clarification: This story has been updated to reflect that the suspicious package found at a Southeast Austin FedEx facility is believed to be a bomb, according to U.S. Rep. Lloyd Doggett’s office. 
 
 
 
 4:54 p.m. update: ﻿U.S. Rep Lloyd Doggett has confirmed to the American-Statesman that a suspicious package found at a FedEx facility in Southeast Austin on Tuesday is believed to be a bomb. 
 
 “They’re trying to figure out how to open the package without destroying it,” said Doggett, who had been briefed by investigators. 
 
 Emergency crews were called out to the facility in the 4100 block of McKinney Falls Parkway shortly after 6 a.m. on Tuesday. 
 
 Crews have remained at the scene throughout the day, but Austin police and FBI investigators had only referred to the device as a suspicious package. 
 
 If the package is confirmed to be a bomb, it would mark the sixth explosive device to target Austin since a rash of bombings began on March 2. 
 
 Another bomb detonated at a FedEx facility in Schertz on Tuesday around 12:30 a.m. Authorities have linked that bomb to a FedEx Office store on Brodie Lane. 
 
 2 p.m. update: FedEx confirmed that the person responsible for shipping a package that exploded in the company’s sorting facility in Schertz also “shipped a second package that has now been secured and turned over to law enforcement.” 
 
 The delivery company’s statement did not specify where the second package was found, but authorities have swarmed a FedEx ground facility in the 4100 block of McKinney Falls Parkway in Southeast Austin after reports of a suspicious package. 
 
 FedEx said it had provided investigators “extensive evidence” surrounding the packages and the person who shipped them that has been “collected from our advanced technology security systems.” 
 
 At about 12:25 a.m. Tuesday, a package that investigators think was destined for Austin exploded on an automated conveyor belt at a FedEx ground facility in Schertz, about 60 miles south of Austin. That package is believed to have been shipped from the Southwest Austin suburb of Sunset Valley. 
 
 ﻿For the full story of Tuesday developments in the Austin bombing attacks, visit MyStatesman.com 
 
 
 
 The FedEx Office store in Sunset Valley – an independent municipality surrounded by the city of Austin – is just two miles from where a bomb exploded in a residential subdivision Sunday night, injuring two men. 
 
 Sunset Valley Police, FBI and ATF agents have had the FedEx store at 5601 Brodie Lane cordoned off with yellow tape since about 6:15 a.m. Tuesday. 
 
 Five of Sunset Valley’s 13 police officers were securing the location, said Sunset Valley police spokesman Lt. Rich Andreucci. 
 
 The Sunset Valley police were told they would be needed to secure the parking lot during the FBI and ATF investigation for four to five hours, Andreucci said, but by 2 p.m. police were still keeping the parking lot and sidewalk around the FedEx office closed to traffic. 
 
 FBI and ATF agents were still on the scene and are not commenting. 
 
 “We don’t get a lot of national attention in our city,” Andreucci said. “We are a very safe community.” 
 
 All of the surrounding businesses including the Mighty Fine Burgers & Shakes were open for business Tuesday morning. 
 
 “Why not eat?” said Mighty Fine Burgers & Shakes customer Roland Burke of Austin. “They had it under control when we got here and it’s a good hamburger.” 
 
 The veteran added, “I’ve been through much more serious things in my lifetime.” 
 
 11:55 a.m. update: Police in the Southwest Austin suburb of Sunset Valley think that a package that exploded early Tuesday at a FedEx sorting facility in Schertz may have been shipped from their local FedEx Office store. 
 
 The Brodie Lane store in a popular Sunset Valley shopping center has been roped off by authorities, including about 15 to 20 federal agents who have been investigating a string of four bombings this month in Austin. The store has been closed but surrounding businesses are still open. 
 
 Sunset Valley city officials said in a statement that there was “no known public threat” to residents or shoppers. 
 
 The FedEx store in Sunset Valley – an independent municipality surrounded by the city of Austin – is just two miles from where a bomb exploded in a residential subdivision Sunday night, injuring two men. 
 
 Sunset Valley Police Chief Lenn Carter said the store has no drop-off point, so whoever "delivered (the package) had to have come inside the store." 
 
 About 12:25 a.m. Tuesday, a package that investigators think was destined for Austin exploded on an automated conveyor belt at a FedEx ground facility in Schertz, about 60 miles south of Austin. That package is believed to have been shipped from Sunset Valley. 
 
 Hours after the Schertz explosion, Austin police and fire crews began investigating reports of a suspicious package around 8 a.m. Tuesday at a similar sorting facility in Southeast Austin near Austin-Bergstrom International Airport. 
 
 Authorities are using a “working theory” that the package that exploded in Schertz was bound for Austin, interim Austin Police Chief Brian Manley told members of the Austin City Council during a work session Tuesday morning. 
 
 "We do believe that these incidents are all related. That is because of the specific contents of these devices," Manley said. 
 
 Four bombs placed in neighborhoods across Austin have killed two people and injured four others since March 2. 
 
 "The first three appeared to be targeting a particular resident – or address, I should say," the chief said, adding that a fourth device – which used a trip wire and was placed in the open – was "very different" and altered investigators’ focus. 
 
 Shortly after Manley briefed council members, Austin police announced that the department has responded to more than 1,200 calls about suspicious packages since 8 a.m. March 12, including 420 calls between 8 a.m. Monday and 8 a.m. Tuesday. 
 
 Members of the @FBI are actively investigating the FedEx Office store on Brodie Lane. The store is closed, but surrounding businesses are still open. #austinbombings pic.twitter.com/FH92TWR2OJ — Mark D. Wilson (@MDWilsonSA) March 20, 2018 
 
 Earlier: Emergency crews are responding to a call about a suspicious package at a FedEx facility near Austin-Bergstrom International Airport in Southeast Austin. 
 
 Authorities respond to a suspicious package at the scene of a Fed Ex facility in southeast Austin March 20, 2018. (Ralph Barrera/American-Statesman Staff) 
 
 Austin police and fire crews, along with Austin-Travis County EMS medics are investigating a package at the FedEx ground delivery facility in the 4100 block of McKinney Falls Parkway. 
 
 A spokesman for Austin-Bergstrom International Airport said its operations have been unaffected, and the FedEx cargo planes are operating as usual. 
 
 Earlier Tuesday, authorities said a medium-sized package exploded at a FedEx ground facility in Schertz, about an hour southwest of Austin. 
 
 One worker there was injured by the concussive effect of the blast but released, Schertz police said. 
 
 This is a developing story. Check back for details 
 
 More investigators arriving at @FedEx facility in Southeast #Austin. Earlier Tuesday, a package exploded at a FedEx ground facility in Schertz. #austinbombings pic.twitter.com/7GF601pjqE — Mark D. Wilson (@MDWilsonSA) March 20, 2018
– Austin cops have been looking for a break in the city's bombing spree, and they're hoping Tuesday morning's explosion at a FedEx facility will provide one. The Tuesday explosion happened at a shipping facility about an hour away from Austin in Schertz. But police think somebody sent the package to Schertz from a FedEx Office store in the Austin suburb of Sunset Valley, reports the American-Statesman. Better yet, the office store has no drop-off option, meaning the person who mailed the package needed to go inside, and thus could be on the store's surveillance video. The package exploded on a conveyor belt at the Schertz facility, though it was supposed to be shipped back out to an unspecified address in Austin. A nearby employee suffered ringing in her ears, but that was the extent of injuries. The store in Sunset Valley is near the location of Sunday night's bombing that injured two men. Authorities can't say for sure whether the Schertz explosive is linked to the four earlier bombs, but Austin police were investigating on that likelihood. One other development that has apparently fizzled: Police initially said they found a second, unexploded device at the Schertz FedEx facility, which could have provided insights into who was putting the bombs together. However, police later backtracked, saying San Antonio police chief William McManus "misspoke" with those comments, per the Washington Post. "There is no secondary device at the Schertz facility," says a spokesperson.