The soldiers were patrolling the Phagwari Gali area in the Mendhar sector when the landmine got activated, the officials said quoting preliminary information.
He was taken to a nearby military hospital from where he was airlifted to Udhampur for specialised treatment.
The security men fired on the militants attempting to sneak into this side of LoC, a Srinagar-based defence spokesman said.
While the bodies of two terrorists have been retrieved, firing from a Pakistani post in the vicinity is interfering with the retrieval of the third terrorist's body.
The Indian Army linked this quaint village, which sits across the Machhal Nala, with a 115-foot-long bridge.
The 115 feet long Bridge has been named as Bhagat Bridge in memory of Late Major Bhagat Singh, Veer Chakra, who laid down his life defending this sector in the 1965 war.
The Chinese side also significantly improved its military infrastructure including its air force facilities in areas bordering India, have been constructing new airbases and expanding existing ones.
The post office is located right on the edge of Pak-occupied-Kashmir (PoK) where the LoC divides the anxious nations.
Singh was speaking at the Kargil War Memorial here on the occasion of the 24th Kargil Vijay Diwas.
The surge in infiltration attempts began from May and the trend continued in June. Five infiltration bids have taken place along the LoC in Jammu and Kashmir during this month.