India said on Monday it had responded to 'unprovoked' firing from Pakistan along the de facto border for the fourth consecutive night, as it deepens its search for militants in the region following last week's deadly attack on tourists in Kashmir.

In the days since, tensions have risen dangerously between India and Pakistan, which have fought two of their three wars over Kashmir.

In a further escalation, the two sides have repeatedly exchanged gun and artillery fire across the Line of Control that demarcates India-held Jammu and Kashmir from Pakistani-controlled Azad Kashmir,