ISLAMABAD: Residents of Iqbal Town, Zia Masjid and Khanna Pull have called for action against sorcerers, who are posing threat to human lives. They said sorcerers have turned graveyards in the areas into dens of addicts. People complained that not only the so-called sorcerers were desecrating the graves of their dear ones but the drug peddlers were also running their heinous business of selling heroine and other narcotics. The so-called sorcerers come late hours at night and practice black magic on the dead bodies of their relatives, said Muhammad Khan, a resident of Zia Masjid.