At least four people have been killed and 13 injured in a bombing near police headquarters in the north-western Pakistani town of Kohat, police say.
The car bomb exploded at the gates to the police family compound as people were breaking their fast during the holy month of Ramadan.
Many buildings have collapsed or been damaged. Rescuers are at the scene.
The blast comes a day after a suicide car bomb targeting a police station in the north-west killed 19 people.
BBC correspondents say militants appear to be back in business following a lull in violence during the recent devastating floods.
Kohat, about 50km (35 miles) south-west of Peshawar, is near militant strongholds in lawless tribal areas.
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