Negotiators will meet in Doha on Tuesday seeking to finalize details of a plan to end the war in Gaza after U.S. President Joe Biden said a ceasefire and hostage release deal, he has championed was on “the brink” of coming to fruition.

Mediators gave Israel and Hamas a final draft of an agreement on Monday, an official briefed on the negotiations said, after a midnight “breakthrough” in talks attended by envoys of both the outgoing U.S. president and President-elect Donald Trump. 

If successful, the ceasefire deal would cap over a year of start-and-stop talks and lead to the biggest release of Israeli hostages since the early days of the conflict, when Hamas freed about half of its prisoners in exchange for 240 Palestinian detainees held by Israel.

U.S. Secretary of State Antony Blinken said the ball was in Hamas’ court. Hamas said it was keen to reach a deal.