Intelligence officials said on Thursday that at least 11 people were killed when a suicide bomber struck a restaurant in volatile northwest Pakistan. The two officials said that the roadside restaurant's visitors at the time included some two dozen militants opposed to Pakistani Taliban leader Baitullah Mehsud. They said that several others were wounded in the attack in the Tank town area near the tribal regions. The officials spoke on condition of anonymity because they were not authorized to the speak publicly to the media. Pockets of Pakistan's northwest are strongholds for Taliban, al-Qaida and other militants. The US has pushed Pakistan to crack down on the extremists.