It said the attack was aimed at security forces and was not intended to kill civilians, but said further civilian losses in its attacks were "inevitable".
The group also warned of future attacks on authorities behind the security operations in southeast Turkey.
The attack came hours after the Turkish government announced a curfew in the Kurdistan region as part of escalating operations against Kurdish militants.
The TAK has previously claimed responsibility for a car bombing attack on a military convoy in Ankara which killed 28 people.
It also claimed responsibility for a mortar attack at Istanbul’s Sabiha Gökçen International Airport last December.
The group presents itself as a splinter group from the Kurdistan Workers Party (PKK).
More about:
