An unidentified gunman opened fire inside Strozier Library on the Florida State University campus in Tallahassee early Thursday morning, injuring three students. The shooter was shot and killed by police.

Tallahassee Police spokesman Dave Northway told the Associated Press the shooter was confronted by police near the front of the library, and after refusing to lower a weapon and reportedly firing one shot, was gunned down by police.

"This person for whatever reason produced a hand gun and started shooting," FSUPD Chief David Perry told reporters.

The Tallahassee Democrat reports that two of the injured students have been hospitalized, one in critical condition, the other in stable condition. The third student was treated and released at the scene.

University officials report that between 300–400 students were inside the library at the time of the shooting. Students described to the Associated Press a chaotic scene inside the library, with students rushing to barricade themselves inside rooms.

"I ran right out the backdoor. My laptop and everything is still in there. It was shock. It was just instinct. You don't think about anything else, you just go," freshman Allison Kope told the AP.

In this video taken by Jessica Davis, an FSU student and ESPNU correspondent, you can hear an announcement being made over the library's sound system alerting students of the shooter.

The university will remain open Thursday, but has cancelled all classes.

[Image via AP]