LUCKNOW: A constable of the Provincial Armed Constabulary (PAC) died under mysterious circumstances after suffering a gunshot injury while on duty at the Central Ammunition Depot in Sitapur, UP, on Saturday, reports Pathikrit Chakraborty. An SIT has been set up to probe the incident.The deceased, Himanshu Kumar, 25, was deputed to the facility two months ago. Police said he was stationed as a sentry at a 20ft high watchtower. Around 8.30am, personnel heard gunshots and rushed to the spot to find him critically injured. He was taken to hospital, where doctors pronounced him dead. The initial probe suggests the shots were fired from his service rifle.