PESHAWAR, Pakistan (AP) — Armed militants ambushed and killed all six people in a police vehicle in northwestern Pakistan, officials said Wednesday.

Police officer Rab Nawaz Khan said the morning attack in the Dadewala area of Lakki Marwat district came during a routine patrol in a suburban area. The attackers escaped on motorcycles.

No group immediately claimed responsibility, but Islamic militants operate in the region had been involved in previous attacks on security forces.

Khan said reinforcement has reached the scene, moved the bodies to a hospital and started an investigation to find the perpetrators.

Northwestern Khyber Pakhtunkhwa province of Pakistan borders Afghanistan and has seen Islamic militants largely known as Pakistani Taliban operate in the area for many years.

The Pakistani Taliban are a separate group, but they are allies of the Afghan Taliban, who seized power in Afghanistan more than a year ago as U.S. and NATO troops were in the final stages of their pullout.

The Taliban takeover in Afghanistan has emboldened the Pakistani Taliban, who are formally known as Tehreek-e-Taliban Pakistan, or TTP. Although the Taliban in Afghanistan have encouraged Islamabad and the TTP to reach a peace agreement through dialogue, talks amid a ceasefire between the two sides that started in May proved futile.