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.

Following Tuesday's massacre of 26 mostly Indian tourists, hostilities have intensified between India and Pakistan over the hotly contested Kashmir region.

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,