"Rescuers are headed toward the scene, more information will be known during the day," the officer on duty at the Public Security Center in the town of Doboj said on Thursday afternoon.

The website added that it learned unofficially there were three persons aboard the aircraft with Serbian registration numbers that crashed at Ozren's highest point of Ostrevica at 13:25 hours CET.

The Serbian aviation website Tango Six is reporting that the plane was a Cessna Golden Eagle C421-B, based out of Lisicji Jarak in Belgrade, registration number YU-BSW, operated by STS Avijacija.

The plane and the crew were in Bosnia-Herzegovina on their regular job airdropping vaccines for foxes.