ANKARA, Turkey (AP) — Turkish officials say Kurdish rebels have detonated an improvised explosive device on a road in southeast Turkey, killing four people and wounding 13 others.

The local governor's office said the explosion Thursday on a road near the town of Kulp hit a vehicle carrying villagers who were returning home after gathering wood. The private DHA news agency said the explosion caused the driver to lose control and the vehicle veered into a ditch.

The Kurdistan Workers' Party, or PKK, has waged a more than three-decade old insurgency in Turkey's mostly Kurdish southeast region. The conflict has killed tens of thousands of people since it started in 1984.

The group is considered a terror organization by Turkey and its Western allies.