A rescue helicopter crashed in central Slovakia on Wednesday night, killing three rescuers and a patient aboard, a spokeswoman for the private rescue service Air Transport Europe said.

Rescuers found the helicopter and four bodies on Thursday morning in Strelniky, a mountainous area near Banska Bystrica, around 240 kilometers east of the capital, Bratislava.

The spokeswoman could not give any details on the cause of the crash.