Four people were sent to the hospital Thursday after an active shooter was reported at Florida State University’s Tallahassee campus.

A spokesperson for Tallahassee Memorial Healthcare told WCTV that four people were being treated at the medical facility following the incident. The extent of their injuries was not immediately known.

FSU locked down its campus after the university said a shooting erupted near the Student Union building around noon.

Students inside the Student Union told WCTV they heard about 15-20 gunshots before fleeing for safety at a church across the street.

“Police are on scene or on the way,” FSU said in an alert. “Continue to seek shelter and await further instructions. Lock and stay away from all doors and windows and be prepared to take additional protective measures.”

The FBI is assisting authorities at the university, an agency spokesperson told ABC News.

• Matt Delaney can be reached at mdelaney@washingtontimes.com.