Ten people have been killed and three more injured after a military helicopter crashed in south-east Turkey on Thursday, the country’s Defence Ministry said.

“One of our four heroic comrades who were injured in the helicopter crash in Tatvan could not be saved, and he died, despite everything possible done in the hospital. The number of our martyrs has increased to 10. We wish the mercy of Allah to our heroic martyrs,” the ministry said on Twitter. 

​Earlier in the day, it reported that nine officers were killed and four more injured in the crash. 

“Communication with the helicopter that took off from Bingol to Tatvan at 13.55 [10.55 GMT] was lost at 14.25 [11:25 GMT]. Immediately, unmanned aerial vehicles, a CN-235 aircraft and a helicopter were sent in search. As a result, it was established that the helicopter had crashed. On the scene of its fall, nine dead and four injured were found,” the ministry said in a statement.

​An operation is underway to transfer the injured to the hospital.  

The causes of the disaster are not reported.​