Authorities say three people are wounded following a shooting outside a Denver-area concert.

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

The office says a suspect or suspects are being sought and all cars are being searched as concertgoers leave the facility.

The three wounded traveled by car into nearby Denver where they were located by police and taken to a hospital. There office says it doesn't know their conditions.

No arrests have been made.

The Denver Post says the concert featured Nas, Schoolboy Q and Flying Lotus.

Almost two hours after the conclusion of the event, there were still many people on the scene.