Czech police and emergency services said a shooter had been “eliminated” after killing at least 15 people and wounding “dozens” more at a university in the capital, Prague, on Thursday.

Images on social media showed students barricaded in classrooms and emergency vehicles swarming a square in Prague’s old town. Police said on X, formerly Twitter, that the shooter was dead, and the school, Charles University, was being evacuated.

Prague’s emergency response service said on X that around 25 people were injured, 11 of them seriously. The shooter was a student at the university, police said at a news conference, according to the Associated Press.

“The on-site intervention is still ongoing. At this moment we can confirm more than 15 dead and dozens injured,” Czech police said Thursday night on X, hours after the shooting was first reported. “We have no information at this time that the perpetrator is connected to any terrorist organization.”