Naik Raj Kishor Singh was a soldier of the 6th Battalion, The Bihar Regiment. He belonged to Piparpatti village in Bhojpur district of Bihar and came from a family with a strong connection to military service. His father had served in the Army, and two of his brothers also followed the same profession. Raj Kishor joined the Army after completing his schooling and served as an infantry soldier with 6 Bihar.
In September 2016, his battalion was deployed in the Uri sector of Jammu and Kashmir. On the morning of 18 September, the Army camp came under a major terrorist assault. The attackers used automatic weapons and incendiary ammunition, resulting in intense fighting and fires inside the camp. Raj Kishor Singh was among the soldiers who sustained serious injuries during the attack.
Following the incident, he was evacuated for treatment and eventually transferred to an Army hospital in New Delhi. His family travelled to Delhi hoping for his recovery, but his injuries remained severe. He continued to receive medical treatment for several days after the Uri attack.
Naik Raj Kishor Singh ultimately succumbed to his injuries on 29 September 2016. He had served his unit during a critical security deployment and lost his life as a result of the Uri terrorist attack. His sacrifice is remembered alongside the other personnel of 6 Bihar and the Indian Army who lost their lives in the attack.