OHIO --A campus in America's heartland became a crime scene today when a student at Ohio State University went on the attack.
RELATED: Quick acting Ohio State officer praised for killing attacker
He ran down people in a car, then assaulted others with a knife. There were 11 victims in all, one wounded critically.
If it hadn't been for a brave police officer, it might have been worse.
Now, police want to know if the attacker, an immigrant from Somalia, was a lone wolf terrorist.
There was confusion and chaos on the OSU campus.
Investigators say Monday morning a driver jumped a curb and plowed into several people near the school's engineering building. Witnesses say he got out, armed with a bugcher knife and started slashing.
"I was walking up 15th, people started running up 15th. People were like, 'don't go to campus,'" said one student.
A heroic campus cop, 28-year-old Alan Horujko, two years on the force, opened fire, killing the suspect.
"Saw a cop yell at him to get down," said an eyewitness. "The suspect charged him and that's when the cop shot him down."
There was no active shooter, but the terrifying scene and the officer's shots sparked panic. OSU students barricaded themselves in classrooms. The university Tweeted: Active shooter? Run, hide, fight.
"Everybody was running in any direction they possibly could," said OSU student Cydney Fugazzi. "I ran into a bathroom, luckily it was just a single stall and I was able to lock myself in there."
The attacker, identified as OSU student Abdul Razak Ali Artan, 18, is said to be an immigrant and legal US resident.
Investigators say on social media he was upset about the treatment of Muslims, posting on Facebook minutes before the attack, "I can't take it anymore."
"Certainly the authorities need to treat this as a potential terrorist attack," said Matt Olson.
RELATED: 8 stabbed, hit by vehicle or otherwise hurt at Ohio State
Police and FBI are searching the suspect's home for more clues on his motive, but leaders in the Muslim community here spoke out, urging people not to jump to conclusions and falsely link this tragic incident to the faith of Islam.