Television images from the crash site showed the ground blanketed in snow and visibility hampered by thick clouds in the mountainous region.

Ruling AKP party lawmaker Tolga Agar, who sits of parliament's defence committee, tweeted that Lieutenant General Osman Erbas was among the dead.

Erbas is officially listed as the head of the Turkish army's 8th Corps.

The defence ministry did not immediately confirm the senior commander's death in a statement which said contact with the helicopter was lost in the Bitlis province 30 minutes after it took off.

"Nine heroic soldiers fell as martyrs and four were injured in the accident," the defence ministry said, adding that the injured were being transported to hospital.

"I pray for Allah's mercy for our nine martyrs... Our pain is great," Turkish President Recep Tayyip Erdogan's spokesman Ibrahim Kalin tweeted.

Turkish media reports said Defence Minister Hulusi Akar and Interior Minister Suleyman Soylu were both travelling to the site of the crash.

The defence ministry said the accident involved a Cougar helicopter but provided no details about the model.

The Cougar family of multi-purpose helicopters were developed by France and are now produced by Airbus.

The accident occurred in a region where Turkish forces regularly conduct military operations against outlawed Kurdish militias.

In 2017, a military helicopter crashed in the southeastern Sirnak province near Turkey's border with Syria and Iraq, killing 13 soldiers.

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