India and Pakistan troops exchanged fire in the Jammu and Kashmir region on Friday, according to officials in New Delhi, as relations between the nuclear-armed neighbors continue to plummet after a deadly attack on tourists this week.

Relations between India and Pakistan are cratering following a deadly attack in the disputed Himalayan region of Jammu and Kashmir that left more than two dozen tourists dead, raising fears of military escalation between the nuclear-armed rivals.

It was the deadliest attack against civilians in years in Kashmir, a region claimed by both India and Pakistan that has been racked by violence for decades.