Some unidentified person shot dead three police officials in PIB Colony in Pakistan\'s Karachi on Thursday. Some unidentified gunmen, riding on motorcycles, opened fire on a police mobile patrolling in PIB Colony in Karachi, seriously injuring three police officials, Pakistan\'s (Dunya) News reported. The injured police personnel were rushed to the Jinnah Hospital where they died of their wounds. The attackers fled away after the incident, taking with them the official ammunition.