As many as four police personnel were injured in an IED blast triggered by militants in Manipur's Chandel district on Friday. The blast occurred when a police convoy was heading towards Imphal through Kwatha Khunou Lamkhai area in the hill district. Following the blast, police reinforcements have been rushed to the spot and the injured were airlifted to Imphal in an IAF chopper for treatment. This is the second attack carried out by militants on security personnel this month. Earlier, two personnel of the Territorial Army (TA) were killed in an IED blast carried out by militants when the team was on road opening duty.