BERKELEY -- Once again, a terror attack half a world away has stung UC Berkeley, as anguished friends and family frantically search for a student missing after the massacre in Nice, France. 
 
 Still shaken from the death of a student killed two weeks ago by armed militants in Bangladesh, Cal now fears 20-year-old Nicolas "Nick" Leslie was lost, hurt or worse in the aftermath of the Bastille Day attack in the French resort city. College and State Department officials Saturday said there was no update on his whereabouts. 
 
 Family and friends have not heard from Leslie since he was seen Thursday evening running from the promenade where a truck plowed into a large crowd of revelers, killing more than 80 people and injuring some 200 others. Police later killed the driver. 
 
 Nick Leslie, 20, is a UC Berkeley student missing after a Bastille Day attack in Nice, France, that killed at least 84 people. (Contributed photo) 
 
 "We are devastated. People are very upset. It's unbelievable," UC Berkeley spokeswoman Claire Holmes said. "We are all hoping that Nick Leslie is found and gets returned safely." 
 
 Leslie, a junior majoring in the College of Natural Resources was among 85 UC Berkeley students in Nice participating in a 15-day conference called Entrepreneurship and Innovation in Europe, part of the International European Innovation Academy, according to the UC Berkeley media department. 
 
 Many were traumatized by the attack and some have returned home; three of them suffered injuries, the university said. 
 
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 Leslie's Italian aunt and uncle on Friday were in Nice traveling from hospital to hospital looking for him, as his parents said prayers in their Southern California home. Leslie is from Milan, Italy, and went to Torrey Pines High School in San Diego, according to his Facebook page. 
 
 "We know he successfully avoided colliding with the truck, but we lost him in the stampede and chaos that followed," Leslie's friend Abhinav Kukreja wrote on Facebook. 
 
 Leslie's father, Conrad Leslie, on Friday was distressed but hopeful that his son would be found safe soon. The family is working closely with UC Berkeley and U.S. embassy officials. "We are praying for the people who already lost people and praying for our son to come home safe," Conrad Leslie said from the family home in Del Mar on Friday. "Our hearts go out to people who have already got bad news. We haven't heard anything yet." 
 
 Consular teams in Nice, Marseille and Paris have been working with other U.S. government agencies and French authorities to account for all American citizens, according to the State Department. 
 
 "We aware of reports that a U.S. citizen is missing. As in any case where a U.S. citizen is reported missing, we are in close touch with the family and working intensively to coordinate with French authorities to locate the individual," the State Department said in a statement Saturday. "Due to privacy considerations, we cannot comment further." 
 
 Other Bay Area residents vacationing there witnessed the carnage. One moment, Walnut Creek resident Sara Luka was watching the "beautiful fireworks show." Then chaos erupted. 
 
 "Literally a big white van was driving and crushing people, children, women and men," Luka wrote in a message to this newspaper. 
 
 She grabbed her 6-year-old daughter Nell and told her 8-year-old son Tiger to run. 
 
 "All the time there was huge chaos and screams and crying. I didn't know what to do, jump in a bush or lay down or keep on running," she said. They ran and made it back to their hotel room safely, Luka said. 
 
 At its daily briefing Friday, the State Department said two Americans, Sean Copeland and his 11-year-old son, Brodie, of Texas, were killed in the attacks. It made no reference to any other Americans who were unaccounted for or injured. 
 
 Three Cal students suffered injuries: Vladyslav Kostiuk, 23, a senior computer science major in the College of Letters and Science, sustained a broken leg; Diane Huang, 20, a senior majoring in environmental economics and policy in the College of Natural Resources, broke her foot; and Daryus Medora, 21, broke his leg. Medora, an undeclared sophomore, remained in a hospital Friday. 
 
 "Many of them had gone to be part of the celebrations and see the fireworks when the tragic acts of terrorism occurred," Holmes said. 
 
 The conference in Nice was temporarily suspended Friday because of the tragedy. UC Berkeley offered to bring its participating students home before the conference's July 24 end date. On Friday afternoon, four Cal students had already left Nice; two planned to leave Saturday and one expected to leave Sunday. 
 
 A representative of the campus's study abroad program was on a plane headed to Nice on Friday, the university said. 
 
 Within two hours of the attack, a Cal professor had accounted for all the Berkeley students except for Leslie. The students underwent training to prepare for an emergency. 
 
 "That's part of the protocol in today's world. The students are taught to share their phone numbers, stay in contact via Facebook with regard to their whereabouts," Holmes said. 
 
 Students from UC Davis, Merced, Santa Cruz and one student from the Peralta Community College District were also in Nice at the time of the attack, according to Holmes. A Stanford University official said none of its students were in Nice on summer programs. 
 
 Cal's campus was largely empty Friday during the summer break. Elise Cantiran, a French citizen studying in a French and American comparative literature program, said she worried for her friends back home who vacation in Nice this time of year. 
 
 "I have no news from them," said Cantiran, who arrived in Berkeley a week ago. "I have tried to contact them via Facebook but so far, nothing." 
 
 Many of Leslie's friends have taken to social media in the search to find him. Others in the Cal community posted about the grief and their concern for Leslie's whereabouts on the university's Facebook page. 
 
 "My boyfriend and I are Cal alum and we were on the promenade watching the fireworks just a few minutes before the truck hit," Raina Verma wrote. "We would have been there when the attack happened, but decided to go back to our hotel just a few minutes away to get my jacket before we headed to dinner further down the promenade. 
 
 "It makes me shudder to think what could have happened had I not gone back for that jacket," Verma wrote. 
 
 This is the second time this month that UC Berkeley students working or studying abroad have been victims in a terror attack. UC Berkeley sophomore Tarishi Jain, 18, was in Dhaka, Bangladesh, for an internship when she was killed July 2 in an attack at a restaurant. 
 
 The Associated Press and staff writer Matthias Gafni contributed to this report. Contact Malaika Fraley at 925-234-1684. Follow her at Twitter.com/malaikafraley. 

 Anguished family waits for news of UC Berkeley student missing in Nice 
 
 Friends, relatives and government officials were frantically searching Friday for a UC Berkeley student who was in the French resort city of Nice and has not been seen since a terror rampage there Thursday killed at least 84 people. 
 
 Loved ones pleaded on Facebook and Twitter for help finding Nick Leslie, 20, while holding out hope that he escaped the carnage of the deadly truck attack on Bastille Day that left 202 people injured, including three other UC Berkeley students. 
 
 Nick Leslie, a UC Berkeley student, was missing after the terror... 
 
 “We just want our son back,” said Conrad Leslie, the student’s father. “We haven’t gotten the bad news. Our thoughts and prayers go to the people who have.” 
 
 Leslie’s uncle was going from hospital to hospital in the South of France coastal city Friday trying to find him. Conrad Leslie said his family has received “incredible support” from the UC Berkeley campus and U.S. and French government officials in the search for his son. 
 
 A State Department spokeswoman said the U.S. Consulate in Marseille, France, is working to account for every U.S. citizen in Nice but that privacy considerations prevented the agency from discussing specific cases. 
 
 “We’re just hoping that Nick is safe and he’s coming home,” said Claire Holmes, an assistant vice chancellor. “He was very connected to the campus. A lot of people know him.” 
 
 Leslie, a junior in UC Berkeley’s College of Natural Resources, was among 85 UC Berkeley students in Nice for a four-week-long European Innovation Academy, an international program that helps students with their startup ideas, according to the campus. The program was put on hold for three days of national mourning after the attack, and several students left the program early and were on their way home Friday. 
 
 UC Berkeley’s study-abroad staff was working with local officials to find Leslie, the university reported. 
 
 Three of Leslie’s peers were injured in the attack. UC Berkeley students Vladyslav Kostiuk, 23, who suffered a broken leg, and Diane Huang, 20, treated for a broken foot, were both discharged from local hospitals, university officials said Friday afternoon. A third student, 21-year-old Daryus Medora, remained in the hospital with a broken leg. 
 
 Mustapha Khokhar, a friend of Leslie’s, said he received a video via Snapchat from him just 15 minutes prior to the attack. It showed Leslie dancing at the Bastille Day celebrations, said Khokhar, who hasn’t heard from Leslie since. 
 
 “I’m hoping he just lost his phone,” Khokhar said. “Fingers crossed.” 
 
 UC Berkeley is providing on-the-ground counseling in Nice for students affected by the attack. Students from UC’s Davis, Merced and Santa Cruz campuses were also in the city, according to Holmes. Leslie remains the only Berkeley student unaccounted for. 
 
 According to his Facebook page, Leslie lived in Del Mar (San Diego County) before attending UC Berkeley and was originally from Italy. 
 
 Two Americans, a father and son from Texas, have been reported as among the dead. 
 
 Earlier this month, another UC Berkeley student, 18-year-old Tarishi Jain, was one of the hostages killed in an attack at a popular restaurant in Bangladesh. Jain, a native of India, had just started an internship in Dhaka, Bangladesh, through a UC Berkeley program. 
 
 “The campus community has really connected with the tragic violence around the world on a real personal level,” said William Morrow, 21, UC Berkeley’s student body president. “It shows how interconnected our world is, how interconnected violence is.” 
 
 As students got word that Leslie was missing, some on the Berkeley campus said recent terror attacks made them wary of studying abroad. 
 
 UC Berkeley student Brenda Zhang, 19, said the latest attack in France made her more cautious about her travel plans for Europe. But others, like Lee Chen, a graduate student, said their intentions to go abroad hadn’t changed. 
 
 “The fear is what they’re trying to create,” Chen said of terrorists. “I don’t want to give in to that.” 
 
 San Francisco Chronicle staff writer Kevin Schultz contributed to this report. 
 
 Kimberly Veklerov is a San Francisco Chronicle staff writer. Email: kveklerov@sfchronicle.com Twitter: @kveklerov 

 The family is "concerned and they are grieving for everybody that has had any loss there and sending their prayers to everybody. They are confident that Nicolas is well," Antonella said. "He's not in any of the list of the deceased so that's comforting to them. They think that he might be in shock or just trapped some place and need the help of the police to get out."
– A 20-year-old UC Berkeley student is still missing following Thursday's attack in Nice, France, and his family, friends, university, and government are desperately trying to find him. The San Francisco Chronicle reports Nick Leslie was one of 85 UC Berkeley students in Nice for the European Innovation Academy. He sent a Snapchat video of himself dancing at the Bastille Day celebrations to a friend just 15 minutes before the attack that killed at last 84 people and injured more than 200. He hasn't been heard from since. “I’m hoping he just lost his phone,” the friend says. “Fingers crossed.” Another friend who was at the scene tells the Mercury News he saw Leslie running from the promenade as the truck hit the crowd. "We know he successfully avoided colliding with the truck, but we lost him in the stampede and chaos that followed," the News quotes the friend as saying. Three other UC Berkeley students were injured in the attack. ”We have 85 over there. We found 84,” a university spokesperson tells the Los Angeles Times. “We’re hoping that Nick is coming home.” Leslie is originally from Italy and still has family in the area. On Friday, his aunt and uncle were searching Nice-area hospitals for him. The family remains "confident" he's alive as he hasn't appeared on any lists of the deceased. “We just want our son back,” Leslie's father tells the Chronicle. “We haven’t gotten the bad news. Our thoughts and prayers go to the people who have.” A father and son from Texas are the only Americans confirmed killed in the Nice attacks. (Another UC Berkeley student was killed in a terrorist attack earlier this month in Bangladesh.)