In an unusual chain reaction, police in Black Hawk, Colorado, say a motorcyclist was shot in the chest when a gun he was carrying went off as a hit-and-run car struck the motorcycle.
The hit-and-run happened at about 10:15am on Wednesday in Black Hawk.
A four-door Chevrolet sedan hit the motorcycle and the rider was thrown to the ground, Police Chief Stephen Cole said.
The impact of the collision caused a handgun the motorcyclist was carrying to fire, shooting the rider in the chest.
The car driver fled the scene. The motorcyclist, a 60-year-old Pennsylvania man, suffered serious injuries and was rushed by ambulance to a Denver hospital.
Police recovered the handgun at the scene.
Gilpin County sheriff's deputies later found the Chevy sedan abandoned at a campground north of Black Hawk. The driver, a man in his 30s or 40s, ran from the car.
Police arrested the hit-and-run suspect at about 1:30pm.