At least 12 people have died in a bomb blast in the north-western Pakistani city of Peshawar, according to police.
A suicide bomber attacked a police investigation bureau in the Swati Pathak area, which is close to a Pakistani army garrison, the BBC reports.
Security has been tightened across Pakistan after a series of attacks in Lahore and the north-west on Thursday.
About 40 people died in those attacks, the latest in a recent wave of militant assaults across the country.
Peshawar was targeted last Friday when a deadly bomb ripped through a busy market in the city.
Meanwhile, the United States government has pledged to continue to support the Pakistani government's battle against hardline militants.
President Barack Obama has signed into law a $US7.5 billion aid package for Pakistan, as its key anti-Taliban ally reels from the latest wave of deadly attacks.