Arunachal Pradesh state's civil aviation commissioner Hage Khoda told CNN that at least six people, including the pilot and the co-pilot, were injured in the crash that happened at around 2 p.m.

The incident happened when the helicopter, belonging to the state-run Pawan Hans company, missed the helipad on landing and caught fire, Khoda explained.

He said an inquiry has been ordered into Tuesday's accident. Pawan Hans operates daily helicopter flights between Tawang in Arunachal Pradesh and Guwahati in neighboring Assam.