Lukeswar Singh(41), hailing from Punjab's Gurudaspur, allegedly shot himself at the camp of 105 Battalion of BSF at Boipariguda yesterday, they said.
"The jawan had fired from his gun and died instantly as the bullet pierced his head. The reason behind the extreme step is yet to be ascertained," said Koraput Superintendent of Police Awinash Kumar.
The body is being sent to his native place after postmortem, he added.