KARACHI (INP) - Four people, including the nephew of President Asif Ali Zardaris security incharge, were killed in separate incidents of target killings in different areas of the city on Sunday. According to police sources, gunmen snatched the weapon of the security guard of a filling station in Korangi and fired shots at him, injuring him critically. The guard was rushed to Jinnah Hospital where he died. He was identified as Hanif Khan. In SITE area, unidentified armed men opened fire killed a man and injured another at Walika Chowrangi. The dead was identified as Abdul Majeed and injured as Asif. The police said unknown people injured 22-year-old Owais who died during treatment in Civil Hospital. The PPP sources said Owais was a party worker and the nephew of security incharge of President Zardari. Earlier police recovered body of a 20-year-old youth near new Rizvia Society in Safoora Goth. He was murdered by firing. In Banaras Chowk, Parvez was injured by firing and Muhammad Umer by attack with knife.