U.S. Secretary of State Marco Rubio called senior officials in India and Pakistan in an effort to defuse the crisis that followed last week’s deadly attack in Kashmir, the State Department said.

Pakistan is bracing for Indian military action before Thursday night, officials warned, but cautioned that neither side would benefit from a return to war.

An attack targeting Hindu tourists in Indian Kashmir that killed 26 men has triggered new tensions between India and Pakistan and sparked fears of a conflict, with Pakistan saying it has intelligence suggesting India intends to launch military action.