A medical college outside St. Petersburg hosted a surprise “anti-terrorist training exercise” on Dec. 3, using armed and masked individuals pretending to be terrorists. One woman in the group even wore a fake suicide bomb vest. According to reports on social media, neither the students nor the faculty at Tikhvinsky Medical College were warned in advance, and many believed terrorists had actually seized the school.

“People were in shock,” one witness wrote on the Internet. “Some went into hysterics. They faced some people to the wall, and didn’t let them use their phones. When one girl refused to give up her phone (or to turn it off), they put a gun to another student’s head and said they’d shoot, if she didn’t give in.”

According to the Russian tabloid “Life,” the training exercises were carried out by the “Patriot” Military-Patriotic Education and Citizen Training Center — an organization created by the local regional government. Pavel Baranenko, the group’s director, told Life that the college’s administration should have notified students about upcoming “safety prevention measures,” but he says there was no need to disclose any further details.

