Long-sought hostage release-ceasefire agreement could be formally announced within hours, sources say, with captives possibly starting to go free Sunday

U.S., Qatari and Egyptian mediators shuttled between the Israeli and Hamas delegations in Doha on Tuesday, where officials said a deal to halt the war is near.

The United States, Egypt and Qatar have spent the past year trying to mediate an end to the 15-month war and secure the release of dozens of hostages.