The incident is being blamed on the Kurdistan Workers' Party rebels
A car bomb attack at a police headquarters in Turkey has killed at least 11 people.
Dozens of other people were injured in the blast, which happened near the headquarters of an anti-riot police force in the town of Cizre.
The state-run Anadolu news agency says that rebels from the Kurdistan Workers' Party (PKK) carried out the attack using a truck laden with explosives.
The Turkish health ministry says it has sent 12 ambulances and two helicopters to the site.
Hurriyet Daily News reports that Prime Minister Binali Yıldırım has declared "total war" against terrorism in the wake of the attack.
Cizre is in Sirnak, a province that borders both Syria and Iraq, and has a largely Kurdish population.
The PKK has been involved in almost daily clashes in the region since July 2015, when its ceasefire with the government collapsed.
The group is listed as a terrorist organisation by Turkey, the United States and the European Union.
Reporter Sam Kiley said that Cizre had been a "hotbed of resistance to Turkish rule".
He added: "It has been the scene of very heavy fighting and widespread destruction over the last year, in tit-for-tat exchanges between the Turkish military and Kurdish elements.
"This is one of a string of attacks against security forces who have hit back extremely hard in the past."