Diyarbakir: Two Turkish soldiers were killed in a firefight with Kurdish guerrillas in southeast Turkey overnight, security sources said on Thursday.

Supported by Cobra attack helicopters, security forces launched an attack on a group of separatist Kurdistan Workers Party (PKK) militants in mountainous Sirnak province, near the border with Iraq.

One soldier was also injured in the clash, during which helicopters landed special forces troops on Kato mountain.

Some 40,000 people have been killed in the conflict since the PKK launched its armed insurgency against the Turkish state in 1984 with the aim of establishing a Kurdish homeland in the southeast of the country.