India's Prime Minister Narendra Modi says the gunmen behind a terrorist attack on tourists in the Kashmir region "will not be spared!"

The long-simmering conflict in Kashmir, India, blew up on Tuesday, when Islamic Kashmir separatists killed 26 tourists and injured over a dozen others. The attack was the deadliest terrorist attack in India since the 2008 Mumbai attacks,

Tensions between India and Pakistan escalated sharply Thursday, as the Pakistani government said it would consider it "an act of war" if India followed through on a threat to block the flow of crucial rivers as punishment for a deadly militant attack this week in Kashmir.