The crash involved a Cessna 150 and a Bell 407 helicopter, according to the Federal Aviation Administration (FAA).

One person was killed and two Pennsylvania State Police troopers were injured after a small plane collided with a state police helicopter during a training exercise at Carlisle Airport in Cumberland County, Pennsylvania, United States, on Wednesday evening, the authorities said.

The crash involved a Cessna 150 and a Bell 407 helicopter, according to the Federal Aviation Administration (FAA).

The Cessna had only one person aboard, while the helicopter was carrying two pilots who were members of the Pennsylvania State Police's elite aviation unit.

Acting Pennsylvania State Police Commissioner, Lt. Col. George Bivens, said the Cessna pilot was killed in the collision, while the two helicopter pilots sustained injuries but were expected to survive.