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,

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.

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