Updated 12:59 p.m.: Law enforcement officials have identified Myron May, a lawyer and graduate of FSU, as the shooter.
Florida State University has canceled all classes this morning as students, faculty and families across the state grapple with the latest burst of campus violence. Police say a gunman walked into FSU's library around 12:30 this morning and opened fire, hitting three students.
The gunman was later killed by officers after walking outside and firing in their direction.
Details are still sketchy on the shooting, with police so far releasing little information about the shooter or the victims. But FSU students have been posting harrowing video and Tweets from inside the library during the violence.
FSU's Strozier Library was still crowded with studying students after midnight when the shooter walked in and began firing. Students fled through the building, hiding behind bookshelves and in some cases barricading doors with furniture:
A few minutes after firing, the gunman confronted police outside and was killed.
"The initial report indicates that as the officer got to the area, they located the gunman near the entrance of Strozier Library and he was challenged by the police officers to drop his weapon,'' Tallahassee Police spokesman David Northway told reporters. "Instead of complying with their commands, the gunman in turn fired a shot at the officers and they returned fire, killing the suspect."
One victim is in critical condition, while a second is in fair condition, the Palm Beach Post reports. The third was grazed by a shot, treated at the scene and released.
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FSU President John Thrasher says the school is adding more officers to campus today as investigators unravel what sparked last night's violence.
"The three students who have been injured are our highest priority followed by the needs of our greater university community," he says in a statement. "We will do everything possible to assist with their recovery.
We'll update this post with new information.