Virginia Tech University, site of a 2007 massacre that killed 32 people, said Thursday that a police officer and one other person had been shot in an incident on campus.

A police officer has been shot. A potential second victim is reported, the university said on its Twitter feed.

Stay indoors. Secure in place, the message said.

The school described the suspect as a white male in gray sweat pants and a maroon sweat shirt.

MSNBC reported that a campus police officer and a suspect exchanged shots at a traffic stop and that the suspect was still at large.