A Los Angeles police helicopter crash-landed during a training exercise in the Antelope Valley, injuring three officers.

The helicopter made a hard landing Thursday afternoon at the General William J. Fox Airfield in Lancaster, about 40 miles northeast of Los Angeles.

Ian Gregor of the Federal Aviation Administration says the chopper was practicing controlled landings without power when it came down hard on a taxiway.

Los Angeles County fire Inspector Steve Zermeno says the chopper's underside was damaged. He says one officer onboard suffered moderate injuries and two had minor injuries. They were taken to a hospital for treatment and are expected to survive.