The bomb was placed under the car of an army officer, parked outside his home in the town of Idil, near the borders with Iraq and Syria.

A passer-by was wounded, the sources said.

The authorities suspect the attack was the work of the outlawed Kurdistan Workers' Party (PKK), which is fighting the army in the southeast and has often carried out similar attacks.

The conflict has claimed 37,000 lives since 1984 when the PKK, blacklisted a terrorist group by Turkey as well as the European Union and the United States, took up arms for Kurdish self-rule in the region.