The officer, who was unarmed, was going from the officers' mess to the adjacent residential area, where his family was residing, sources said here.
The gun shots, fired from close range, proved fatal for the officer, who was the second-in-command of the unit.
Bikramjeet, who hailed from Chandigarh, had joined the elite Armoured Corps after passing out from the prestigious Indian Military Academy in December 1998.
The Commanding Officer of the unit, Col Avin Utthaiya, who was seriously injured in the firing by terrorists, was one of the first people in the unit to react to the attack.
