In Assam , three persons including one jawan of Assam police’s special task force were killed on spot and two others were injured in an ambush by the unidentified extremist at Laisong under Mahur police station in North Cachar Hill district on Monday afternoon. <br/><br/>According to police, extremist armed with sophisticated weapons hiding nearby jungle suddenly attacked on the two vehicles of the police at about 1-30 pm on Monday. The injured two police personnel were admitted to Haflong civil hospital and their condition is stated to be critical and later they have been shifted to Silchar Medical College Hospital by helicopter. So far no extremist group has claimed the responsibility for the attack. A massive combing operation is on to arrest the extremist.