webCOLUMBUS: -At least eight people were injured in an apparent car-ramming and knife attack at Ohio State University on Monday, triggering an hours-long lockdown before authorities declared the campus secure.

One suspect was shot and killed, the university said in a statement, while local television station WBNS reported that police had led two people out in handcuffs from a garage they surrounded on the campus in Columbus.

Rebecca Diehm, spokeswoman for the city´s fire department, said eight people were transported to hospital — one in critical condition, and the rest stable. Media reports suggested as many as 10 were injured.

A university statement said: “Victim injuries include stab wounds, injury by motor vehicle and other injuries that are being evaluated.”

OSU Wexner Medical Center tweeted that it was treating four victims, none with life-threatening injuries. One witness suggested that a suspect had plowed into a crowd with a red SUV.

The incident was called an active shooter situation, but it was unclear whether any of the victims had suffered firearm injuries.

An unnamed student quoted by the local NBC affiliate said that students had evacuated a building due to a fire alarm, and that a man had then “started slashing at them” with a knife or machete.

“There were one or two people inside a car and they tried running over people,” the student said. “One person jumped out and started slashing people.”Authorities lifted the alert shortly after 11:30 am (1630 GMT), around two hours after the start of the incident.

“Shelter in Place lifted. Scene is now secure. ALL classes are canceled on Columbus campus for the remainder of the day,” the OSU emergency management services tweeted as it declared the incident over.

A subsequent tweet advised the public to avoid the area in the north of the sprawling campus, saying: “Police continue to process scene.”