Two Turkish security troops have been killed and 24 wounded in a suicide attack by Kurdish Workers' Party (PKK) militants.

A tractor carrying two tonnes of explosives was detonated by a suicide bomber at a military police station in Dogubeyazit district of eastern Agri province, close to Turkey's border with Iran.

Turkey's official news agency says about 260 Kurdish fighters have been killed in strikes in northern Iraq and Turkey since July 24. At least 16 Turkish forces have been killed by the PKK since July 20.

Turkey has received broad support from Western allies for its recent bombing campaign, but it has been urged not to undo years of peace efforts with the Kurdish party.