A police officer and three militants were killed in a clash in the outskirts of the northwestern Pakistani city of Peshawar early Monday morning, police said, Xinhua reported.
Senior police officer Ijaz Ahmad said that a group of armed militants opened fire on a police mobile at Hayat Abad area of Peshawar, the capital of Khyber Pakhtoonkhwa province.
Assistant Sub-Inspector, Mohammad Sajad, died at the scene and another policeman was also injured, Ahmad said.
The militants were trying to enter the nearby Khyber tribal region and when the police signaled them to stop, they opened fire at the police mobile van.
TTP or Tehrik-e-Taliban Pakistan and another militant group Lashkar-e-Islam are active in Khyber agency, which is also a main supply route for NATO troops in Afghanistan.
The police took in custody weapons of the militants, which include automatic guns and hand grenades.
Meanwhile hundreds of people have fled Tirah valley of Khyber agency as the result of infighting of Lashkar-e-Islam group, reports and displaced persons arriving in Peshawar said.
Locals said that several commanders have revolted against the group's leader Mangal Bagh, prompting several clashes between the rival commanders.
In another incident suspected militants blew up a power supply tower in Mohmand tribal region late Sunday night, suspending supply of electricity to several areas.
Pakistani authorities blame suspected militants for attacks on schools and government buildings in the restive tribal belt along the border with Afghanistan.