PESHAWAR, Pakistan – A suicide car bomb devastated Pakistan's main spy agency building in the northwest Friday, killing at least 7 people and striking at the heart of the institution overseeing much of the country's anti-terror campaign.

The blast in Peshawar was the latest in a string of bloody attacks on security forces, civilian and Western targets since the government launched an offensive in mid-October against militants in the border region of South Waziristan, where al-Qaida and Taliban leaders are believed to be hiding out.

The early-morning blast, heard across the city, dest