The incident occurred last evening when Mohammad Islam posted as a forest guard in Churani range visited the residence of forest sub-inspector Ashutosh Gautam who lives at a short distance away from the range headquarters at Nagthat and knocked at his door, they said.
As soon as Gautam opened the door, the forest guard opened fire on him, killing him on the spot, they said.
Villagers rushed to the Gautam's residence as they heard the sound of gunshots and found the 36-year-old official lying in a pool of blood.
Though the exact motive behind the killing is not yet known, it looks like an act of revenge as the forest guard was peeved over being slapped by Gautam a few days back, the officials said.