A racing plane plunged into the stands at an air race event in Reno in what an official described as a "mass casualty situation."
It wasn't immediately known how many people were killed. But video of the crash showed a horrific scene of bodies and wreckage at the front of the stands.
The National Championship Air Races draws thousands of people every year in September to watch various military and civilian planes race.
Kind of ironic, but earlier this week, race officials posted this video of how fans could stay safe and healthy at the races. This ended up being a little more serious than a sunburn.