Investigations have been launched after a helicopter reportedly crashed after swerving to avoid a consumer drone.
A trainee had been practising hovering about 15m (50ft) above trees on Daniel Island, South Carolina, reported the Charleston Post and Courier newspaper quoting a police report.
Seeing a quadcopter flying towards them, the instructor had taken control.
But he had clipped a tree with the tail rotor, causing the helicopter to crash to the ground and tip on to its side.
The National Transportation Safety Board said it “had not yet been able to independently verify” the pilot’s report.