The state-run Anadolu news agency said “terrorists” affiliated with the Kurdistan Workers’ Party, or PKK, carried out the bombing in the town of Hani in the Diyarbakir region.
The blast occurred after an explosives-laden vehicle rammed into a gendarmerie base in the town of Hani in the Diyarbakir province late on Monday.
The security forces launched a search operation to capture those responsible following the bombing.
Turkey’s southeast has witnessed a surge in violence since July when a fragile peace process between the state and Kurdish militants collapsed.