Mukesh Kumar of the 33 Rashtriya Rifles was killed late Monday in Kalal area, about 150 km from here, near the LoC that divides Jammu and Kashmir between India and Pakistan.
"According to the report lodged with the police, Mukesh Kumar and Ratinder Kumar of 33 Rashtriya Rifles, posted in Kalal area, had a tiff at about 11.30 p.m. last night," said Senior Superintendent of Police (SSP), Rajouri, Mubassir Latifi.
Following the tiff, Ratinder Kumar sprayed bullets at Mukesh Kumar from his AK 47 rifle, killing him on the spot. He was later overpowered by other colleagues.
The army is also inquiring into the incident.
A week ago, a paramilitary Sashatra Suraksha Bal (SSB) trooper had shot dead two colleagues and injured two others in Kishtwar.
'Look' how the Sheena Bora case has taken a toll on Indrani Mukerjea
Photos: Katrina Kaif, Parineeti Chopra, Shilpa Shetty's movie outing in Juhu
Birthday special: 14 Bollywood actors who made it big on TV
Photos: Vaani Kapoor, Poonam Pandey, Sana Khan at fashion event
Photos: Rishi Kapoor, wife Neetu, daughter Riddhima at book launch