The ceasefire will see Gaza hostages and Palestinian prisoners in Israel freed.
A ceasefire between Israel and Hamas in Gaza went into effect on Sunday morning. Hostages held in the strip and Palestinian prisoners in Israeli jails will be freed in the first phase of the deal.
Meanwhile, the November ceasefire in Lebanon is holding despite ongoing Israeli airstrikes on Hezbollah targets, which Israeli officials say are responses to ceasefire violations by the Iranian-backed militant group. Israeli forces also remain active inside the Syrian border region as victorious rebels there build a transitional government.
Tensions remain high between Israel and Iran after tit-for-tat long-range strikes in recent months and threats of further military action from both sides. The IDF and the Yemeni Houthis also continue to exchange attacks.
Hamas' military wing -- the Al-Qassam Brigades -- said it "handed over three Israeli female prisoners" to the Red Cross in Gaza City.
The transfer occurred "in the vicinity of the Saraya Junction" amid "a large crowd," the force added in a statement.
-ABC News' Samy Zyara
An Israeli source confirmed to ABC News that the transfer of hostages to the Red Cross had begun.
-ABC News' Jordana Miller
A spokesperson for the U.K. Foreign, Commonwealth and Development Office said the government welcomed Sunday's announcement that joint British-Israeli national Emily Damari will be among three hostages released from Hamas captivity in Gaza.
"We stand ready to support her upon her release," the spokesperson told ABC News. "We urge both sides to implement all phases of the deal in full and for all hostages to be returned," they added.
-ABC News' Somayeh Malekian
"Hostages starting to come out today," President-elect Donald Trump wrote in a post on Truth Social early Sunday, referring to the opening phase of the Gaza ceasefire deal.
"Three wonderful young women will be first," Trump added.
Trump claimed credit for what he called an "epic" agreement when the deal was announced last week, although President Joe Biden appeared to brush off the role Trump played.
The incoming president said his administration "will continue to work closely with Israel and our allies to make sure Gaza never again becomes a terrorist safe haven."
-ABC News' Kelsey Walsh
