Triple shooting after rap concert outside Denver

Last Updated Jun 20, 2014 7:05 AM EDT

GOLDEN, Colo. -- Authorities say three people were wounded during a shooting outside a Denver-area concert.

The Jefferson County Sheriff's office says the Red Rocks Amphitheatre was shut down late Thursday night after the violence erupted in the parking lot after the concert.

The office says authorities are seeking a black male with a rifle.

All cars were searched as concertgoers left the facility. Thousands attended the event.

The three wounded traveled by car into nearby Denver, where they were located by police and taken to a hospital. The sheriff's office says there were two other people in the car, according to The Denver Post.

Denver Health Medical Center said early Friday all three victims were in fair condition.

No arrests have been made.

The amphitheatre website says the concert featured Nas, Schoolboy Q and Flying Lotus. All are rappers.

Almost two hours after the concert ended, there were still many people on the scene, the Post says.

The newspaper adds that the concert was a benefit for, among other causes, GRASP, a gang-rescue and support project sponsored by the Metro Denver Partners.

The amphitheatre is located near Morrison, Colo., 15 miles west of Denver. It's a well-known concert venue where the audience sits outdoors.