blantyre wave attack malawi people accuse vampirism spread second-biggest city blantyre vigilante mob kill two people police say thursday lynch mob attack begin mid-september country one world poor belief witchcraft widespread six people already die attack blantyre thursday mob torch 22-year-old epileptic man chileka another man stone death ... suspect blood sucker say ramsy mushani national police spokesman reuters reporter witness first incident police checkpoint road lead city airport family member confirm man epileptic kill walk home nearby hospital malawian president peter mutharika visit part country affect vampire scare try prevent deaths innocent people unite nations u.s. embassy blacklist several district malawi dangerous zone staffers nationals early month un pull staff two district southern malawi malawi 'vampirism mania spread two die mob violence