Security forces on Thursday called off its two-day-long operation in the upper reaches of Kupwara, which left a militant dead.
Police sources said the army's 18 and 28 Rashtriya Rifles and the police's special operation group killed a militant on Tuesday evening.
Intermittent firing was reported on Wednesday too.
However, the militants hiding in the forest range of Affan in the Mehandiwali Behak area of Lalpora, Kupwara, 100 km north of Srinagar, managed to break the cordon and flee.
The area was also taken over by dense fog and inclement weather, which helped the militants' escape.
According to an army spokesman, the joint operations continued on Wednesday. "Some more militants being trapped in the area cannot be ruled out," he said.
The army said it recovered an AK rifle, six magazines, 140 rounds, two radio sets, a GPS and some administrative items during the search.
In a separate operation, the army, based on specific inputs, launched an operation in the area of Safawali Gali, 10 km north of Kupwara. "Around 614 AK ammunition, 11 grenades and two bombs of mortar were recovered in the operation," the Srinagar-based spokesman added.