The drones have been pressed into service to pinpoint the location of terrorists who have taken positions in the forest area on a hilly terrain in Jammu and Kashmir's Anantnag district.
The officials have said that the operation continues to flush out the ultras in the hilly terrain that entered the fourth day on Saturday.
Additional Director General of Police (Kashmir) Vijay Kumar said the operation was launched based on specific input and is currently underway, PTI said.
In a post on X, Kumar said the two-three trapped terrorists will be neutralised.
He also advised retired police and Army officers to avoid peddling ambush hypothesis in the media, it said.
"Retired police/Army officers should avoid 'ambush hypothesis'. It is a specific input-based ops. Ops is in progress and all 2-3 trapped terrorists will be neutralised," he said, it mentioned.
Earlier, as the gunfight entered its third day, security forces fired mortar shells towards the forest area on the mountainous terrain, the report said.
It added drones were pressed into service for aerial surveillance.
"The forces fired mortar shells on the terrain where they believe the terrorists are hiding based on drone surveillance," the officials said, it added.
The security forces have maintained a tight cordon in the area, they added, it mentioned.
Major Ashish Dhonchak, 19 Rashtriya Rifles Commanding Officer Col Manpreet Singh, Deputy Superintendent of Jammu and Kashmir Police Humayun Bhat and a soldier were killed in an encounter with the terrorists at Gadole in the Kokernag area of the south Kashmir district on Wednesday.