The attack in the Dogubayazit district of the eastern Agri province is the first time Kurdistan Workers Party (PKK) militants have been accused of staging a suicide attack in the current crisis, amid an escalating cycle of violence that appears to have no end in sight.
Ankara has launched a two-pronged "anti-terror" offensive against PKK militants based in northern Iraq after a wave of attacks inside Turkey.
Turkish official media claiming that 260 suspected PKK members have been killed so far -- and the militants have retaliated inside Turkey.
There is also growing controversy over possible civilian casualties in the Turkish bombings, and the local Kurdish authorities in northern Iraq on Saturday urged the PKK to spare civilians.
The suspected PKK suicide bomber drove a tractor laden with explosives up to the military station in the Dogubayazit district, the official Anatolia news agency reported, quoting the local governor's office.