A bomb attack in Pakistan's largest city Karachi on Sunday killed at least seven people, including women, and wounded 50 others, police said. The blast hit near the entrance to an area dominated by minority Shiite Muslims, senior police official Ghulam Shabir Sheikh told AFP, though he said that the target of the attack was not immediately clear. "The heavy explosive was planted in a car. Up to now at least seven people have been killed and more than 50 injured. There are some women among the dead," Sheikh told AFP.