COLUMBUS, Ohio -- Up to 10 people were hospitalized after a knife-wielding man attacked several people at Ohio State University on Monday, sending ten people to hospitals and prompting a campus-wide lockdown, authorities said.
Nine victims are in stable condition, and one is in critical condition.
The suspect is dead, and authorities on the ground believe the threat is contained. The university released a statement after the attack.
"A suspect has been shot and reported deceased," the university said. "Victim injuries include stab wounds, injury by motor vehicle and other injuries that are being evaluated."
The suspect ran into a group of pedestrians on a street corner with his vehicle before using a weapon to cut several people, OSU President Dr. Michael Drake said. The assailant used a butcher knife, OSU Police Chief Craig Stone said.
OSU Emergency Management lifted a shelter-in-place order late Monday morning.
"Scene is now secure," the department tweeted. But classes are canceled for the rest of the day.
As the chaos unfolded, university officials reported an active shooter incident at Watts Hall.
It's possible the gunshots heard were those of police trying to stop the attacker, a federal law enforcement official said.
Investigators believe the assailant also used a car at the beginning of the attack, and the entire attack happened outside.
OSU student Jacob Bower, 20, said he saw a man pull a knife outside between the Koffolt Laboratories and Watts Hall.
"He pulled a large knife and started chasing people around, trying to attack them," Bower told CNN. He said it appeared to be a large kitchen knife.
"Luckily there were so many people, he couldn't focus on one target. I didn't see anyone get stabbed, but I saw the police officer take down the stabber. He waited till everyone was clear, and the stabber clearly wasn't stopping. (It) took three shots to take him down. (The) stabber had a crazy look in his eyes."
When asked if the suspect yelled or said anything during the attack, Bower told CNN: "He was completely silent. Which was very creepy. Not even when he was shot (by police)."
"The cop that subdued the guy with the knife saved so many lives today."
The motive for the attack was not immediately known.
'Run Hide Fight,' university says
Earlier, campus officials urged people to shelter in place.
"Buckeye Alert: Active Shooter on campus. Run Hide Fight. Watts Hall. 19th and College," OSU Emergency Management tweeted Monday morning.
Watts Hall is the university's materials science and engineering building.
OSU senior Anthony Falzarano, 22, said he was in class at the time.
"We heard a lot of sirens. I was in class and everyone got a text message at the same time for the emergency alert," he told CNN during the lockdown. "Someone said they heard popping right before we got the alert, but I didn't hear it. We are in a shelter-in-place right now in the building next door. "
"The officers are putting on Kevlar vests and have big weapons," he said. "I can't see anyone going inside the building -- there's just so many cops here."
Some students piled chairs against a door to barricade themselves.
"I'm safe in a barricaded room," Harrison Roth tweeted. "If you're on campus, get in a room and stay safe."
Ohio State University's main campus in Columbus is one of the largest in the United States. The university has more than 65,000 students enrolled across the state.
Students had just returned to class Monday after the Thanksgiving break -- and after the OSU football team's big win Saturday over the school's biggest rival, University of Michigan.
Michigan's athletic department tweeted its support for OSU, saying "Stay safe, Buckeyes."
Students are getting ready for final exams, which begin on December 9.
The incident also comes during the first month of the OSU public safety director's job. Monica Moll came to the helm on October 31.