10:59amCT Update: Law enforcement sources say the suspect primarily used a knife and a car in the attack on the OSU campus.

10:37amCT Update: Shelter in place on campus of OSU has been lifted. Law enforcement says the area is now secure. Investigators say the shooter was acting alone.

10:25amCT Update: Local media reports say that at least one suspect is dead. It's unclear if it was self-inflicted or if the suspect was killed by police. SWAT teams continue to surround one building on campus.


DEVELOPING: An active shooter was reported on the campus of the Ohio State University campus Monday, the school said.

"Run Hide Fight," the school tweeted at 9:56 a.m.

Campus police tweeted the same alert, and wrote in another tweet, “Continue to shelter in place. Avoid area of College.”

There was no immediate word on whether a shooting had taken place or if there were any injuries. The school's newspaper, The Lantern, indicated in a tweet that someone was down.

 "There's at least one body bag present in front of Koffolt Labs," read the tweet. "OSU police still advising to take shelter. Situation not under control."

The sprawling, 58,000-student main campus in downtown Columbus is one of the nation's largest.