Devlet Bahceli, leader of the Turkish opposition Nationalist Movement Party, urged to thoroughly investigate the crash of the Cougar military helicopter in Turkey's south-eastern Sirnak province, the party said June 2.
The helicopter crashed at 8:55 pm (1755 GMT), the military said, adding that an investigation was underway.
The crash occurred just three minutes after takeoff when the helicopter got caught in high voltage power lines in the Senoba district of Sirnak province, the Sinrnak governor said in a statement.
Turkey's chief of staff, General Hulusi Akar, had travelled to the region on the same night to carry out an inspection on site. Emergency search and rescue teams rushed to the scene, as well as the Defense Minister Fikri Isik, after being acquainted with the incident.
In March, seven people, including four Russians, were killed when a privately owned helicopter crashed in Istanbul after hitting a television tower.
Turkish military forces are embroiled in conflict with Kurdish PKK militants who are based out of Sirnak's mountain ranges.