Islamabad:  The death toll in hand grenade attacks and firing in Pakistan’s southern port city of Karachi has risen to 16, including seven women and two children media and police said. Faisal Bashir, superintendent of police, said the violence was the outcome of a clash between two rival groups that left 15 people including the gang leader’s brother and four women dead and injured over 30 people, including school children. The violence broke out when members of two rival gangs opened fire and hurled hand grenades at each other after exchanging harsh words in Jhat Par market of Karachi city. Police said one of the gangs kidnapped a member of the other Tuesday night which led to the fierce clash.