A bomb attack killed two people and wounded 16 others at a Sufi shrine in Peshawar on Thursday, police said. The explosives were planted near the Panj Peer shrine in a densely populated part of the northwestern city, which runs into Pakistan's tribal belt strongholds of Taliban and Al-Qaeda. "Two people were killed, 16 were wounded," police official Tahir Ayub. Worshippers had gathered for a weekly event at the shrine, normally held on Thursday evenings, when the bomb detonated. "It appears that the target was the worshippers who were gathered here," Ayub said. The shrine houses the graves of several Sufi saints. There was no immediate claim of responsibility but Islamist militants such as the Taliban vehemently oppose Sufi worshippers, who follow a mystical strain of Islam. According to an AFP tally, attacks blamed on Islamist bombers have killed more than 5,000 people in Pakistan since government troops raided an extremist mosque in the capital Islamabad five years ago. Pakistan says 35,000 people have been killed by terrorism in the country since the start of the US-led war on Al-Qaeda after the 9/11 attacks on the United States.