Imphal, May 19 (PTI): Four Manipur police commandos were injured, two of them critically, in an IED blast triggered by militants in the state's Chandel district today. The blast occurred at around 12.45 pm on Imphal-Moreh road, some 10 kms from the border town of Moreh, when a police convoy was heading towards Imphal through Kwatha Khunou Lamkhai area in the hill district, police said. Following the blast, police reinforcements have been rushed to the spot, a senior police officer said. The seriously injured personnel were airlifted to Imphal in an IAF chopper for treatment, he said.