URGENT: Someone opened fire Thursday afternoon at a psychiatric clinic at the University of Pittsburgh, injuring several people, police said.

Authorities did not say how many people were hit in the shooting at the Western Psychiatric Institute and Clinic in the city's Oakland section. The Pittsburgh Tribune-Review reported that five people were shot, among them a Pittsburgh police officer.

SWAT team was on the scene. A street was blocked off, and the area thronged with police.

The clinic describes itself on its website as a top academic-based psychiatric care center. The University of Pittsburgh's psychiatry department is on the campus.

The university as well as nearby Carlow University are reportedly on lockdown.

The Associated Press contributed to this report.