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.

India and Pakistan exchanged small arms fire along the contested Kashmir border for a fourth straight night even as New Delhi ramped up a security crackdown in the Himalayan region following a militant attack that left 26 people dead.