As many as 12 persons were died of drinking poisonous liquor during last three days in Karachi while six others are under treatment at hospitals, police sources said. According to police, seven persons were died in Lyari area while others were died in Risala, Faisal, Maripur, Gulzar and Lalji areas during last three days. According to doctors, injured people are critical in condition and would hardly survive while they could also become physically handicapped once for all. Police are conducting investigation into incidents, police sources added.