UPDATE: 4:22 p.m. EST — Abdul Razak Ali Artan, who police said attacked nine people on campus at Ohio State University with a car and knife Monday, was a student at the school, authorities confirmed in an afternoon news conference. The officer who fatally shot Artan was identified as Alan Horujko.
The university, which shut down in the wake of the active shooter situation, will reopen Tuesday as scheduled. "Ohio State will be stronger for having come through this," Gov. John Kasich told reporters.
UPDATE: 3:23 p.m. EST — The man accused of wounding nine people in an attack on Ohio State University's campus is Abdul Razak Ali Artan, anonymous law enforcement officials told NBC News Monday. Artan, 18, reportedly moved from Syria to the United States in 2014.
On Monday morning, police said, he hit multiple pedestrians with his car, then got out and slashed them with a knife. An officer responding to the campus scene fatally shot Artan.
UPDATE: 1:55 p.m. EST — President-elect Donald Trump took to Facebook to address Monday's Ohio State University attack that sent nine people to the hospital.
"Our thoughts and prayers are with all of the students and administration," he wrote, praising the school's emergency management team for sending out an immediate alert about the incident. "THANK YOU to all FIRST RESPONDERS who reacted immediately and eliminated the threat on campus."
UPDATE: 1:24 p.m. EST — Ohio State University went on lockdown Monday morning when a man on campus hit people with his car, then got out and slashed others with a knife, university president Michael Drake said in a news conference. The incident, which prompted an active shooter alert, left nine victims in local hospitals and the attacker dead.
The suspect, whose identity had not yet been released Monday afternoon, "drove a vehicle over the curb" just before 10 a.m., Ohio State Police Chief Craig Stone told reporters. The suspect hit pedestrians, exited the car and "drew a butcher knife" he used to cut passers-by before being fatally shot by a police officer.
His motive was still under investigation. Stone would not say whether authorities had uncovered ties to terrorism but noted rumors of another suspect were unfounded. "This was done on purpose," Stone added. "As far as we know, there was one suspect, and that suspect was DOA [dead on arrival]."
The victims were being treated Monday for largely non-life-threatening stab wounds and motor vehicle injuries.
UPDATE: 12:44 p.m. EST — An attack on the Ohio State University campus Monday resulted in stab wounds and a victim being hit by a car, a school spokesman told the Associated Press. It was unclear who carried out the attack or why. Up to 10 people were injured, CNN reported.
UPDATE: 12:04 p.m. EST — Although Ohio State University lifted its shelter-in-place warning motivated by an active shooter situation Monday, police officers said people should continue to avoid the Lane Avenue garage on campus, according to the Lantern. Authorities confirmed to NBC-4 that the suspect was dead and eight people were hospitalized.
UPDATE: 11:42 a.m. EST — Ohio State University lifted its lockdown after about an hour and a half after it first alerted students to reports of an active shooter on campus Monday. "Scene is now secure," it wrote on Twitter.
Buildings closed included Watts, Fontana, Smith, Celeste, Evans, Arps, Ramsmeyer and MacQuigg, according to the update.
UPDATE: 11:32 a.m. EST — Lawmakers near to and far from Ohio State University took to social media Monday to react to news of an active shooter situation that reportedly wounded at least seven people.
UPDATE: 11:24 a.m. EST — As an active shooter situation continued to develop Monday, Ohio State University's Wexner Medical Center issued a statement to NBC-4 that it was "collaborating with local authorities to understand what has happened and to manage the situation." The center remained open as usual despite a lockdown on campus.
"Law enforcement will continue to have a visible presence on campus," Ohio State's department of public safety wrote on its webpage. "All academic classes on the Columbus campus have been canceled for the remainder of Monday, November 28, 2016."
UPDATE: 11:14 a.m. EST — Highway exits near Ohio State University were closed Monday after the school issued an alert about a shooting that sent at least seven people to local hospitals, 10TV reported. Police have handcuffed two people on the Columbus campus but have not sent out any updated information on social media.
UPDATE: 11:05 a.m. EST — One suspect in the active shooter situation Monday at Ohio State University has died, according to NBC-4.
UPDATE: 11:04 a.m. EST — Schools in the Columbus suburb of Upper Arlington were on lockdown Monday as police investigated reports of an active shooter at the nearby Ohio State University, Superintendent Paul Imhoff tweeted. Concerned parents could call the school district for more details.
UPDATE: 10:59 a.m. EST — If confirmed, the active shooter situation at Ohio State University Monday would be the first campus shooting since Nov. 17, according to Everytown. The last incident occurred at a St. Paul, Minnesota elementary school. In that case, a gun was discharged, but nobody was wounded.
UPDATE: 10:51 a.m. EST — Two of the seven people reportedly transported to the hospital in wake of an active shooter situation at Ohio State University were stable, the Associated Press reported Monday. The FBI was on the scene.
You can see a live stream of coverage from Ohio State University's campus here.
UPDATE: 10:45 a.m. EST — Fire department officials confirmed to NBC-4 Monday that seven people have been taken to the hospital after an active shooter situation at Ohio State University.
The Ohio State police department tweeted that students and staff should continue to shelter in place and contact them only with information about the incident.
UPDATE: 10:39 a.m. EST — Police at Ohio State University were converging Monday around Watts Hall, home of the materials science and engineering department, in light of an active shooter situation.
UPDATE: 10:30 a.m. EST — Ohio State University put out a second emergency alert Monday as its active shooter situation continued to unfold. At 10:20 a.m. EST, the school told students and staff to "continue to shelter in place in north campus area" and to "follow directions of police on scene."
Shortly afterward, Ohio Gov. John Kasich tweeted that he was praying for the college community.
No reports of shots fired or injuries have been verified.
UPDATE: 10:27 a.m. EST — At least one person appears to have been injured Monday in Ohio State University's active shooter situation. Student newspaper the Lantern tweeted that its reporters saw "at least one body bag" on campus, while WSYX ABC 6 reported "at least three people were shot."
No injuries have been confirmed. The school is still on lockdown.
UPDATE: 10:19 a.m. EST — Rep. Tim Ryan, D-Ohio, tweeted Monday that he was closely monitoring reports of an active shooter on campus at Ohio State University. After issuing a Buckeye Alert just before 10 a.m. EST, police began sweeping the area near Watts Hall, according to the Columbus Dispatch.
Ohio State University issued an emergency alert Monday morning warning of an active shooter on campus. "Run Hide Fight," it wrote on its website. "Watts Hall. 19th and College."
No shots were confirmed to have been fired, though unverified reports were rolling in on Twitter:
Ohio State, which has its main campus in Columbus, has more than 60,000 students. In September 2015, the campus police released an active shooter response training video on YouTube. In it, students are urged to "scatter and run" and then call 911, letting the dispatchers know they're on Ohio State's campus..
This is a breaking news story. Check back for updates.