PESHAWAR: Militants in northwestern Pakistan blew up at least 15 tankers carrying fuel for Nato troops in neighbouring Afghanistan Friday, killing four people, police said.

The militants struck at Peshawar’s Ring Road.

Senior police official Imtiaz Shah told AFP that the militants had planted timed devices on the fuel tankers.

Police officer Liaquat Ali Khan says the dead were either drivers or their assistants.

Militants and criminals often attack trucks carrying supplies for US and Nato troops.

The supplies arrive in Pakistan's port city of Karachi and travel overland to Afghanistan.