(CNN) -- Two Pennsylvania State Police troopers shot late Friday, one fatally, were ambushed just outside the police barracks in Blooming Grove, Commissioner Frank Noonan told reporters. 
 
 Cpl. Bryon K. Dickson was killed and Trooper Alex T. Douglass was in stable but critical condition, Noonan said Saturday. 
 
 The shooting happened at 10:50 p.m. Friday in a rural, wooded area. 
 
 "It cuts us to the core that such an event could happen," Noonan said. "[They] really had no chance to defend themselves. It's a cowardly attack." 
 
 Dickson and Douglass were young troopers with families. Dickson previously served at the Philadelphia barracks, according to Noonan. 
 
 "Every attack on an officer of the law is an attack on our state, our country and civilized society," Gov. Tom Corbett said in a statement. Corbett ordered that all state flags in the Capitol complex and at commonwealth facilities in Pike County fly at half-staff to honor Dickson. 
 
 Investigators were interviewing a "person of interest" Saturday morning, but no arrests had been made, spokeswoman Trooper Connie Devens said. 
 
 Noonan stressed that police would be interviewing "hundreds" of people. 
 
 Earlier, Noonan said police had no description of the shooter or any information about the motive. 
 
 "This attack seems to be directed particularly at the Pennsylvania State Police," Noonan said, but warned that residents should be careful. 
 
 "Until we have this person in custody, obviously everyone should be cautious and aware that there is a dangerous criminal on the loose," he said. 
 
 Police from New York, New Jersey and throughout the Northeast are assisting in the search, Noonan said. 
 
 Pennsylvania State Police are offering a $50,000 reward for information that would help lead to the arrest and conviction of an individual responsible for the shooting. 
 
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 CNN's Joe Sutton, Mayra Cuevas and Carma Hassan contributed to this report 

 BLOOMING GROVE, Pa. (AP) — Two troopers were ambushed outside a state police barracks in northeastern Pennsylvania during a late-night shift change, leaving one dead and another injured, and authorities were searching Saturday for the suspect or suspects, state police said. 
 
 One trooper was leaving the barracks in Blooming Grove, Pike County, and another was arriving when shots were fired at 10:50 p.m. Friday, State Police Commissioner Frank Noonan said. He confirmed that one trooper was killed and the other was injured and taken to Geisinger Medical Center in Scranton, where he was in stable condition after undergoing surgery. 
 
 Noonan provided few details on the shooting but said the attack seemed to be directed at state police. 
 
 "This has been an emotional night for all of us," he told reporters. 
 
 Law enforcement officials from across the region, including New York and New Jersey, descended on northeastern Pennsylvania to help with the search on foot and by helicopter. The Blooming Grove barracks is in a wooded area, surrounded by state game lands. 
 
 Noonan said authorities did not have a description of the shooter or shooters but said they were following several leads. 
 
 "We can't say that the situation is completely in hand," he said. 
 
 Noonan said police did not believe the general public was at risk, but they are asking everyone to be on the lookout for anything suspicious. 
 
 "People in the area can come and go freely but should be alert," he said. 
 
 Several roads around the barracks, including parts of Interstate 84, were closed Saturday morning. Blooming Grove is a township of about 4,000 people about 35 miles east of Scranton. 
 
 Trooper Adam Reed, a state police spokesman, said the Blooming Grove barracks covers most of Pike County, which runs along the Delaware River and borders New Jersey and New York. 
 
 "There's a lot of rural area up where they patrol," he said. "As the primary police force in the county, they're going to respond to anything and everything."
– A Pennsylvania state trooper was killed and another wounded in ambush attack outside their barracks last night, authorities say. A "person of interest" is being questioned, but no charges have been filed against the man, reports the Times-Tribune of Scranton. The troopers were shot outside their barracks in Blooming Grove shortly before 11pm during a shift change, reports AP. One trooper was heading into work and another was leaving. Neither has been identified. The wounded trooper is in stable condition after surgery. The barracks is in a wooded area, and a massive air and ground search was launched immediately afterward. "This has been an emotional night for all of us," said state police commissioner Frank Noonan. He did not speculate about a motive but said the attack appeared to be "directed particularly at the Pennsylvania state police," reports CNN. Noonan said he did not think the public was in danger, but added, "We can't say that the situation is completely in hand."