KARACHI (INP) - Nine more people fell prey to violence and torture in Karachi on Monday including four employees of Karachi Water and Sewerage Board (KWSB) pushing the death toll to 91 in six days. The fresh firing incident took place in the Garden area where the armed men opened fire at the KWSB office that killed four employees while two others sustained injuries. The two officials named Anwarullah and Chaudhry Altaf, and two clerks Arif Usman and Abdul Qadir were killed in the attack. Earlier, a body of unidentified man was recovered from the roof of a flat in Gulshan-e-Iqbal, Block-6 who was later identified as Mohammad Mehtab, police said. In Zia Colony area of Korangi, 28-year-old Naveed was injured in firing by miscreants and succumbed to injuries in hospital. Two bodies were also recovered from PIB Colony and Landhi 89 while six persons including a political party activist were killed in Orangi Town on Sunday. According to police, firing in Golimar area of Pak Colony killed 45-year-old Rustam Jan while body of Rizwan was recovered from gunny bag. He was the resident of Garden area. A man named Saeed was shot dead near Sindh Government Hospital in Korangi while two bodies bearing torture marks were also found from Teen Hatti and Machar Colony whose identities are yet to be verified.