COLOMBO, Sri Lanka

At least four people, including two pilots of the Sri Lanka Air Force, died after their aircraft crashed in the central Uva province on Friday.

Two observers and the pilots were inside the Y-12 aircraft as it crashed early morning in a hilly area near Haputale town, some 200 kilometers (124 miles) from Colombo.

According to an official of the Sri Lanka Air Force, the aircraft was engaging in an observation mission at the time of the crash.

The cause of the crash was still not determined, however, the air force has also appointed a special team to conduct investigations

Read more: At least 4 dead in Sri Lanka military aircraft crash