It was the deadliest attack on civilians in two decades in the disputed territory. Both India and Pakistan claim the Kashmir region and have fought two wars over it. Troops from both sides have traded intermittent small-arms fire across the border for the past few days.

A day after the U.N. appealed for restraint following Tuesday's deadly attack in Indian-administered Kashmir, India reported an exchange of fire across the de facto border in the disputed region.

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.