Istanbul (AFP) - The Turkish army on Sunday blamed PKK militants for a deadly car bomb attack that killed two of its soldiers in the Kurdish-dominated southeast, as a fragile truce risked collapsing after Ankara's air strikes on rebel positions in Iraq.

Turkey calls for NATO meeting to discuss security threats Associated Press

Turkey has launched a two-pronged "anti-terror" cross-border offensive against Islamic State (IS) jihadists and Kurdistan Workers Party (PKK) militants after a wave of violence in the country, pounding their positions with air strikes and artillery.

But the expansion of the campaign to include not just IS targets in Syria but PKK rebels in neighbouring northern Iraq -- themselves bitterly opposed to the jihadists -- has put in jeopardy a truce with the Kurdish militants that has largely held since 2013.

The PKK on Saturday said that the conditions were no longer in place to observe the ceasefire, following the heaviest Turkish air strikes on its positions in northern Iraq since August 2011.

The car bomb went off as the soldiers were travelling on a road in the Lice district of Diyarbakir province late Saturday, the statement from the local governor's office said.

"Two of our personnel were killed in the heinous attack, four were wounded," it said.

Turkey army blames PKK for deadly attack as truce unravels