A car bomb attack was carried out at a military station in the Hakkari province, located in southeast Turkey, according to local media reports and security sources.
According to the sources, the explosion targeted the Durak gendarmerie station, 20 km (12 miles) from the town of Semdinli.
Ambulances were send to the area in which the car bomb attack occurred, as Trukish state media links the attack to the PKK, or the Kurdistan Workers Party.
PKK militants are active near the border with Iraq and Iran, in mountainous area of Hakkari.
No group has yet claimed responsibility for Sunday's attack in the Semdinli district, and the number of potential casualties is still unclear.
According to security sources, six Turkish troops were killed and seven people wounded in the attack.
The explosion occurred during vehicle searches on the road in front of the police station, the Dogan news agency said.
The PKK is known as a terrorist group by Turkey, the United States and the European Union. It had launched a separatist insurgency in 1984.
Following a collapse of a two-year ceasefire between the group and Turkish authorities in July last year, violence erupted to levels not seen since the height of the conflict in the 1990s.