A security source, speaking on condition of anonymity, told Turkey's state-run Anadolu news agency that the deadly clashes occurred after a group of PKK militants launched an attack against security forces in Samanli and Cadikan districts.
Nine militants were killed in the clashes, the security source said, adding that two Turkish troops were also injured.
Elsewhere in the southeastern province of Siirt, five Turkish troops were injured when PKK militants detonated a roadside bomb on the Siirt-Sirnak road, the source said.
A shaky ceasefire between the Turkish government and the PKK collapsed in July 2015, and attacks on Turkish security forces have soared ever since.
Turkey has been engaged in a campaign against the PKK in its southern border region in the past months. The Turkish military has also been conducting offensives against PKK positions in northern Iraq and Syria.
The operations began in the wake of a deadly July 2015 bombing in the southern Turkish town of Suruc. Over 30 people were killed in the attack, which the Ankara blamed on the Daesh Takfiri terrorist group.
After the bombing, the PKK militants, who accuse the Turkish government of supporting Daesh, engaged in a series of supposed reprisal attacks against Turkish police and security forces, prompting the Turkish military operations.