According to the police, the deceased, identified as Sajjan Singh, was a constable in the in the Territorial Army. The attacker, who too is a constable with the Territorial Army, is Devender Mann who has been arrested.
"It was a case of mistaken identity. Devender had a tiff with one armyman and had been looking for an opportunity to settle scores with him. On Sunday night, Devender was desperately looking for his enemy to eliminate him when he saw Sajjan sleeping in their camp.
Sajjan was taken to R R Hospital in the Cantonment area where he succumbed to his injuries during the course of treatment.
An FIR under section 302 (murder) of IPC was lodged by the police in this case.
During investigation, police got to know that Devender was last seen near the crime scene. He was apprehended and interrogated by the police during which he broke down and confessed his involvement in the murder, following which he was arrested, police said.