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.

Indian and Pakistani troops exchanged gunfire for a second straight day on Saturday as ties plummeted between the two nuclear-armed neighbours after an attack on tourists blamed on Pakistani militants killed 26 in India's Kashmir region.