The protest took place at Langol Tarung, about 10 km from Imphal.
In the gun attack by a masked man on Saturday night, a construction worker, Mantu Paswn, 20, of Motihari in Bihar was killed. Another worker, Chandan Paswan, 18, was shot in the thigh.
Four of the construction workers had come to a market to buy grocery items when the masked gunman attacked them along a crowded road.
No underground organisation has so far claimed responsibility for the attack.
A woman activist, Chongnu Mante, who participated in the sit-in protest, said: "The killing of the innocent daily wage earner in this manner is highly condemnable. The group behind it should come out and claim responsibility."
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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