The negotiations appeared to gain momentum on Monday as Arab and American mediators pushed for an agreement before President-elect Donald J. Trump takes office.

Israeli negotiators attending ceasefire and hostage release talks in Doha have expressed “cautious optimism,” even as some gaps between both sides persist, a source familiar with the matter told CNN.

Israeli Prime Minister Benjamin Netanyahu is sending the director of the Mossad foreign intelligence agency to ceasefire negotiations in Qatar in a sign of progress in talks on the war in Gaza