UPDATE:

PITTSBURGH (USA Today) — Three gunmen emerged from woods outside a Pittsburgh high school and shot three students Wednesday afternoon at the end of the day, WPXI-TV is reporting.

Via CBS:

Pittsburgh Police dispatch reports that they are responding to a possible shooting at Brashear High School.

Police are on the scene of the high school.

Pittsburgh Police dispatch will only confirm that they are getting reports of at least three people shot.

It’s not known if they are students.