Four days of drone volleys and missile strikes between India and Pakistan, the most intense fighting between the nuclear-armed rivals in decades, ended Saturday when both countries agreed to a ceasefire, according to Indian, Pakistani and U.S. officials.

President Donald Trump announced the ceasefire on his social media site, and said it had been mediated by the United States. Indian and Pakistani officials confirmed the ceasefire, though only Pakistan quickly acknowledged an American role.

“Pakistan appreciates the United States for facilitating this outcome, which we have accepted in the interest of regional peace and stability,” Prime Minister Shehbaz Sharif of Pakistan said on social media.

Secretary of State Marco Rubio said in a statement that he and Vice President JD Vance had engaged with senior officials from Pakistan and India over 48 hours. In addition to the ceasefire, India and Pakistan agreed to “start talks on a broad set of issues at a neutral site,” Rubio said.

But the Indian government contradicted Rubio, saying that the ceasefire had been worked out directly between India and Pakistan and that there had been no decision to hold talks on any other issue at any location.

The crisis began when 26 civilians were killed in a terrorist attack last month on the Indian side of a disputed territory, Kashmir, and quickly escalated into accusations and then outright fighting.

India accused Pakistan of harboring the terrorist groups responsible for the massacre, which Pakistan denied, and last week India struck sites in Pakistan — leading to a series of attacks that both sides described as retaliation.

Some of the most intense fighting took place along the Line of Control, which divides the contested Kashmir region between India and Pakistan.

Dozens of civilians have died on both sides as Indian and Pakistani troops have exchanged fire.

And it was not clear, as night fell Saturday, that the ceasefire had firmly taken hold in the disputed region, where residents reported hearing exchanges of fire.

Fearing the clashes could escalate into all-out war, several countries with close ties to both India and Pakistan, including Saudi Arabia, Qatar and the United Arab Emirates, had been working for days to try to cool the conflict.

Rubio spoke with the foreign ministers of India and Pakistan on Saturday morning, urging both sides to find a way out of the crisis and “avoid miscalculation,” according to the State Department.