A suicide truck bombing at a police headquarters in Turkey's largely Kurdish southeast killed at least 11 and wounded dozens on Friday, August 26, two days after Turkey launched an incursion against Islamic State and Kurdish militia fighters in Syria, Reuters reports.

Prime Minister Binali Yildirim said there was no doubt that the Kurdistan Workers Party (PKK), which has waged a three-decade insurgency for Kurdish autonomy, was responsible for the attack in Sirnak province, which borders Syria and Iraq.

The provincial governor's office said 11 police officers were killed and 78 people, three of them civilians, wounded. There was no immediate claim of responsibility.

The bombing in the town of Cizre was the latest in a series of attacks since a ceasefire with the PKK collapsed more than a year ago, and comes as Turkey tries to recover from a failed July 15 military coup.

More than 1,700 military personnel have been removed for their alleged role in the putsch, including some 40 percent of admirals and generals, raising concern about the NATO member's ability to protect itself as it battles Islamic State in Syria and Kurdish militants at home.

At a news conference in Istanbul, Yildirim said Turkey had opened a war on all terrorist groups. His deputy, Numan Kurtulmus, said on Twitter that Islamic State, the PKK and the Syrian Kurdish YPG militia were all attacking Turkey to take advantage of last month's coup attempt.

"Turkey is in an intense fight against terrorist organizations ... The PKK/YPG and Islamic State seized the July 15 coup attempt as an opportunity," Kurtulmus wrote.

Large plumes of smoke billowed from the blast site in Cizre, footage on CNN Turk showed. The broadcaster said a dozen ambulances and two helicopters had been sent to the scene.

Photographs broadcast by private channel NTV showed a large three-storey building reduced to its concrete shell, with no walls or windows, and surrounded by grey rubble.

The PKK is listed as a terrorist organization by Turkey, the United States and the European Union. More than 40,000 people, mostly Kurds, have died since the rebels took up arms in 1984.

On Thursday Interior Minister Efkan Ala accused the group of attacking a convoy carrying the main opposition party leader, Kemal Kilicdaroglu.

The government has blamed the PKK for a series of attacks this month in the southeast. The group has claimed responsibility for at least one attack, on a police station.