Suspected militants killed four policemen in an ambush near Pakistan's northwestern city of Peshawar on Monday, a police official said. The militants armed with Kalashnikov assault rifles opened fire on a police van then threw an explosive, setting the vehicle alight, in an attack about 10 km (6 miles) south of Peshawar, the capital of North West Frontier Province. "Four policemen have been killed in an attack that happened well after midnight," police officer Nasir-ul-Mulk Bangash was quoted as saying by Reuters. He suspected it was a revenge attack, after police killed a militant during a clash last week in the nearby town of Nowshera. Separately, four children were killed in an explosion in the northern town of Chitral late on Sunday. Police said it was investigating the cause of the blast.
