A shootout Monday between security forces and suspected Kurdish fighters left three militants dead and a police officer injured in Turkey's far eastern Van province, the Dogan news agency reported.
Separately, a car bomb injured nine people in Tunceli province, also a mostly Kurdish area, in the latest such blast amid the ongoing unrest in the country.
The explosion in Tunceli, about 350 kilometres west of Van, took place outside a court house in Ovacik district, CNN Turk reported.
Several militants were captured after the firefight in the centre of Ipekyolu municipality in Van, which is close to the border with Iran.
The eastern and south-eastern regions of Turkey are experiencing daily clashes between security forces and Kurdish fighters, after a ceasefire and peace talks broke down last year. The government has ruled out a return to negotiations.
Meanwhile, the shadowy hardline Kurdistan Freedom Falcons group (TAK), which claimed a car bombing last week in Istanbul that killed 11 people, including six police officers, said it was a suicide bomber who carried out the attack.
In a statement, TAK said the attacker was a woman born in 1984 in the south-eastern city of Diyarbakir, adding that she had been part of the Kurdish nationalist movement since 2005 and giving her the nom de guerre Eylem Newroz.
The state and Kurdish militants have been fighting for more than three decades, leaving tens of thousands dead. Many Kurdish citizens complain of discrimination and want more autonomy for the south-east.