As world powers face multiple crises, the one set off by a terror attack in Kashmir is getting scant attention or help in de-escalating between nuclear-armed neighbors.

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.

India said its troops responded to firing from Pakistan military positions in the Jammu and Kashmir region for a second day on Saturday, as tensions remained escalated between the neighbors after a deadly attack on tourists this week.