WASHINGTON—Nuclear-armed rivals India and Pakistan have agreed to a ceasefire following U.S.-led talks to end an intensifying military confrontation, President Donald Trump announced in a post on his Truth Social media platform Saturday morning.

Hours after the cease-fire was confirmed, there were accusations that the agreement was not being entirely upheld.

The sudden announcement of a U.S.-brokered ceasefire followed four days of steady escalation between India and Pakistan and mixed signals from Washington.