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.

NEW DELHI — A deadly attack on tourists in Indian-controlled Kashmir has again moved India and Pakistan closer to war as the two rivals downgraded diplomatic and trade ties, closed the main border crossing and revoked visas for each other’s nationals.

Troops from Pakistan and India have exchanged fire in the disputed valley of Kashmir, officials in Islamabad said on Friday, as tensions between the rival nuclear powers escalate following a deadly terrorism attack in the region.