An infiltration bid was foiled by troops along the LoC in Macchil Sector of Kupwara district, a defence spokesman said.
Two militants have been killed in the operation, which was going on till reports last came in.
The spokesman said another counter-infiltration operation was in progress in Hafruda forests of nearby Handwara area in the district.
Army sources said helicopters were being used to assist the ground troops to keep track of the infiltrating column of militants.
However, the defence spokesman said he had no knowledge of helicopters being used in the operation.