Three Florida State students were shot and wounded by a gunman inside the school’s library early Thursday morning, before the gunman reportedly briefly exchanged fire and was killed by campus police.

FSU sent out an alert, telling students to seek shelter and to stay clear of windows and doors. It was around 12:30 a.m. that the currently unidentified gunman walked into Strozier Library on FSU campus and opened fire.

At a news conference held Thursday morning, police said they are still trying to piece together what happened, but that the gunman acted alone and that all three students are being treated for gunshot wounds.

The shooting leaves the entire state of Florida in a state of shock, echoed by State University System Chancellor Marshall Criser III.

“The State University System of Florida is deeply saddened by the shooting that occurred early this morning on Florida State University’s campus. Our thoughts and prayers are with the individuals and families who have been impacted,” said State University System Chancellor Marshall Criser III in a release. “The System’s top priority is the safety and well-being of our students, staff and university community. We are proud of our students and Florida State University staff who responded quickly and appropriately to a frightening and dangerous situation.”

FSU President John Thrasher also released a statement, ensuring students that the threat is no longer imminent.

“Florida State University and Tallahassee police departments have done an extraordinary job taking quick and decisive action to prevent further tragedy, to secure the scene and to keep campus safe. They have assured me that there is no further threat,” Thrasher said in a release.