After sneaking into the camp from the rear side, which had thick vegetation that provided natural cover of elephant grass, one of the terrorists fired at the sentry using a silencer-fitted weapon, official sources said.
As someone noticed the fall of the sentry, panic gripped the army camp, which houses an artillery unit having presence of families of soldiers. Soon firing erupted.
Anticipating a hostage-like situation, the army troops with the help of para-commandos rescued the women and children first before launching a final onslaught on the terrorists.
Drones were pressed into the service which helped the snipers eliminate the terrorists inside the camp, the sources said.
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Seven army personnel, including two officers, were killed in the attack by the three terrorists, who were also eliminated in the counteroffensive which lasted nearly four hours.
Seeking to joining the dots related to the attack, multiple security agencies have indicated that three attackers had infiltrated into India from across the international border at Hiranagar in Kathua district of Jammu region.
Not ruling out the possibility of local assistance being provided to the terrorists, sources said they had possibly entered into India on the night of November 28-29 and travelled a distance of 78 kms to the army camp using a well connected national highway before mounting the assault in the morning.
Initially it was speculated that the terrorists could have travelled to the army camp from Kashmir, a possibility that was rejected after the vehicular movement was scrutinised from the CCTVs installed at vantage points along the national highway linking the Valley to the rest of the country.
BSF officials had initially rejected suggestions that terrorists entered through the international border but after the recovery of the wireless set, they started their internal probe. The case is now being probed by National Investigation Agency (NIA).