UK's Lammy and Rubio also discussed the ongoing tensions between India and Pakistan, and called for both countries to maintain the ceasefire and to continue to communicate. Rubio said the U.S. supported direct dialogue between India and Pakistan and encouraged continued efforts to improve communications.

As tensions ratcheted up over the last week of fighting, Pakistan did not consider deploying nuclear warheads to strike India, the country’s foreign minister Ishaq Dar told CNN on Monday.

President Donald Trump announced that the two countries had reached a "full and immediate ceasefire" following a series of escalating attacks.

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.

Secretary of State Marco Rubio urged de-escalation and expressed support for direct dialogue in separate calls with Indian External Affairs Minister Subrahmanyam Jaishankar and Pakistani Prime Minister Shehbaz Sharif on Thursday,

Pakistan and India have held the first round of talks between their Directors General of Military Operations (DGMOs) via hotline, sources confirmed on Monday.The exchange marks a rare instance of direct military communication amid heightened tensions between the two countries that follows recent tensions that saw the two South Asian neighbours on the brink of full-scale war.

India and Pakistan engaged in the most intense fighting in decades with four days of escalating conflict that included fighter jets, missiles and drones packed with explosives. It ended almost as abruptly as it began.

India and Pakistan have been pushed a step closer to war after a gun massacre of tourists on April 22, their most serious confrontation in decades.