IMPHAL, Jan 20: A team of Imphal west commandos shot dead a suspected underground activist at Kyamgei Shantipur at around 10.30 pm tonight. According to police sources, a group of armed persons launched an attack on them at the spot by exploding a hand grenade. Police fired in retaliation during which the militant was killed. However, three of his companion managed to flee under the cover of darkness. Police reportedly recovered another hand grenade from the deceased. There was no injury on the side of the police.