COLUMBUS, Ohio -- An attack on Ohio State's campus left 11 people injured Monday morning. They were stabbed, hit by a car or otherwise injured before the suspect was shot dead, school and hospital officials said.

All Ohio State football players are safe, have been accounted for and were able to return to the practice facility on campus following a lockdown. School and hospital officials announced later Monday that there was not a shooter on campus, despite earlier reports of an active-shooter scenario.

The second-ranked Buckeyes weren't scheduled to practice less than 48 hours after their win over rival Michigan, and the coaching staff had begun to scatter around the country on recruiting visits.

Even though classes were canceled Monday after police announced that the scene had been secured, the Woody Hayes Athletic Center remained open to the team for workouts in the weight room or physical treatment. Doors to the athletic center were locked and required either a key card or help from Ohio State staffers already in the building.

"All our players are safe and accounted for," Ohio State spokesman Jerry Emig said.

The attacker was identified as Abdul Razak Ali Artan, a Somali-born Ohio State student who plowed his car into a group of pedestrians on campus and then got out and began stabbing people with a butcher knife before he was shot to death by a police officer.

Police said they are investigating whether it was a terrorist attack. Campus security officials later said there had been a rumor of a second suspect, but police are confident there was only one attacker.

Officer Alan Horujko, 28, was identified as the man who gunned down the attacker.

The initial tweet from Ohio State emergency officials went out around 10 a.m. and said: "Buckeye Alert: Active Shooter on campus. Run Hide Fight. Watts Hall. 19th and College." University President Michael Drake said the warning was issued after shots were heard on campus.

A handful of players had already made appearances in the practice facility early Monday morning, and the athletic center still had red tape covering any appearances of the letter "M" as part of the buildup to The Game.

Both lacrosse teams had worked out on the indoor field as well, as campus resumed activity following Thanksgiving break and the double-overtime win over Michigan on Saturday.

Information from The Associated Press was used in this report.