Pakistani security personnel secure the site of a suicide attack at a police compound in Kohat on September 8, 2010 the day after the car bomb blast. At least 20 people including women and children were killed and more than 50 wounded on September 7 in a car bomb attack targeting a police headquarters in Pakistan's northwestern city of Kohat. AFP A roadside bomb killed 10 people and wounded four in Pakistan's Kurram tribal region on the Afghan border on Thursday, a government official told Reuters.

The explosion happened in Palaseen village, about 65 km (40 miles) northeast of the region's main town, Parachinar.

"It was a remote-controlled bomb, which was detonated as soon as a passenger van got there," said Hamid Khan, deputy administrator of the region. Those killed were all civilians.

Militants linked to al Qaeda have recently stepped up bomb and suicide attacks in Pakistan after a brief lull amid the worst flooding in the country's history. About 150 people have been killed in the renewed violence in the last week.

The Pakistani Taliban have threatened to carry out more suicide attacks on government targets in response to U.S. drone strikes in Pakistan's lawless regions in the northwest.

In the last 24 hours, four drone attacks have killed 19 militants. There was no independent confirmation and militants often dispute government accounts.