Car bomb in north-west Pakistan city of Kohat

Seven people have been killed and more than 20 wounded in a car bomb attack in north-western Pakistan.

A senior police official in the city of Kohat said a suicide bomber had driven a vehicle into the rear wall of a police station.

He suggested the incident was a response to a military operation that is under way in the area.

On Saturday two suicide bombers killed more than 40 people and wounded at least 60 at a displaced people's camp.

That attack occurred about 40km (25 miles) away from the site of Sunday's attack.

On Friday a suicide attack at a hospital in the south-west Pakistani city of Quetta killed at least 10 people and injured 35 more.

The attacker detonated a bomb in a waiting room at the Civil Hospital where people had gathered following the fatal shooting of a Shia businessman.