**A suicide bomber has attacked a police station in the North West Frontier Province of Pakistan, killing at least three officers, officials say.**The bomber reportedly rammed a vehicle laden with explosives into the building in the town of Karak, not far from Afghanistan.
Several people have been wounded and taken to hospital. Some are said to be in a critical condition.
Reports also say a mosque was damaged in the blast.
No group has claimed responsibility for the attack, but North West Frontier Province has suffered numerous bomb attacks by insurgents over the past year.
The area is a stronghold of Pakistan’s Taliban, and the mountainous tribal areas along the Afghan-Pakistan border are thought to be a sanctuary both for the Afghan Taliban and for militants linked to al-Qaeda.