Karachi, May 09: Pakistan`s southern city of Karachi was tense on Saturday (May 8) as minority Shi`ite Muslims buried the victims of a suicide bomb attack on a mosque on Friday that killed 15 people and injured more than 125. A crowd gathered near an Imam Bargah (Shi`ite worship place) to protest the killing. The police used teargas to disperse the protesters who hurled stones on passing vehicles and attempted a sit-in. Grieving relatives of at least a dozen victims buried their loved ones as authorities deployed paramilitary troops at Shi`ite religious sites in the volatile port city of 14 million people. Additional police were deployed in the city amid fears of further violence. Witnesses said police used batons to disperse groups of angry mourners who went on a rampage in various parts of Karachi. Some of the protesters suffered minor injuries in scuffles with the police, who struggled to control the crowds. The protesters set at least two vehicles on fire, blocked roads and attacked a police post in a Shi`ite-dominated area of the city. They also hurled rocks at vehicles. Business centres in Shi`ite areas were closed after community leaders called three days of mourning. No group has claimed responsibility for the attack, but it bore the hallmarks of a sectarian attack carried out by militants from the Sunni Muslim sect, to which the overwhelming majority of Pakistan`s 150 million people belong. Fayyaz Leghari, the city`s police chief of investigations, said an inquiry was underway to ascertain the identity of the suicide bomber and the motive for the attack. He added that the police had found two mutilated bodies and suspected one to be that of the bomber. However, he said it was premature to say whether the deadliest Sunni Muslim militant group, Lashkar-e-Jhangvi, was behind the latest attack.