Police say a man who stabbed four people near a technical school in a downtown Ohio office building before being shot by an officer had three knives.

Columbus police spokesman Sgt. Rich Weiner says the suspect confronted one victim in the admissions office of Miami-Jacobs Career College on Wednesday afternoon. He said other people inside intervened and took away one knife the suspect was using.

Weiner says those who intervened didn't realize suspect had a second knife.

He says two of the victims were either students or staff at the college. Two others were outside in the lobby area.

Police say one knife was recovered inside the school, and two knives were found near him outside.

Three male victims are in critical condition, and a fourth man has minor injuries. The suspect is in critical condition.