At least 11 people have been killed in a suicide bomb attack in Pakistan's eastern city of Lahore, police say.
More than 60 others were injured when an explosives-laden car targeted a building housing an anti-terrorist wing of the federal investigative agency.
The amount of explosives was so large it brought down the two-storey building, correspondents say.
Close to the country's border with India, Lahore has been hit several times by militants over the past year.
Pakistan's government condemned the attack, blaming "hired killers who want to destabilise Pakistan".