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.

A deadly militant attack on tourists in the Pahalgam area of India's Himalayan territory of Jammu and Kashmir has drawn widespread international condemnation.

The Pakistani government said that if India followed through on a threat to block rivers it would take it as “an act of war.”