Officials said a Border Security Force (BSF) team was on way for change of guard when they were hit by a hail of bullets in Kuil in Pulwama district, 33 kms from here, this afternoon at 1340pm.
The BSF is deployed for securing the Indian Air Force airfield which is used by defence forces for air operations.
The paramilitary squad that came under militant attack belongs to BSF's 165th and 92nd battalions.
Reinforcements of the Rashtriya Rifles and BSF found the troops lying inside the dark-green vehicle in a pool of blood on a wet mud track flanked by bushes next to the airfield.
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Immediately after the firing, the other BSF personnel present on the spot retaliated but the militants fled.
"The vehicle which was hit was the last in the three-vehicle convoy," the official said.