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.
More than 550 humanitarian aid trucks have entered Gaza since a ceasefire began Sunday morning, including 242 to the northern Gaza Strip, a source in the Gaza Interior Ministry told ABC News.
-ABC News' Samy Zyara
Photos were released by Israeli officials on Sunday showing the three released hostages hugging their mothers as they were reunited.
The images showed former hostages Romi Gonen, 24; Emily Damari, 28; and Doron Steinbrecher, 31, all sharing emotional embraces with their mothers.
The three female Israeli hostages released on Sunday and their mothers have boarded an Israeli Air Force helicopter that will take them to a hospital, where they will be reunited with the rest of their families and receive medical treatment, according to the IDF.
Palestinians waited outside an Israeli prison in the West Bank on Sunday anticipating the release of 90 mainly female Palestinian prisoners as part of the hostage release and ceasefire deal.
As Israeli police attempted to move the crowd of mostly young Palestinian men away from the Ofer Prison, 19-year-old Ibrahim Mouadi told ABC News he is hoping to see his 27-year-old sister, Kaja Mouadi, set free. He said he hadn't seen his sister since she was arrested nine months ago when Israeli police raided their family home in the middle of the night.
Ibrahim Mouadi said he and his family have no idea why she was arrested. He said she was never charged with any offense.
“We honestly still have no clue," he told ABC News in an interview near the prison.
He said he suspects Israeli authorities detained his sister because of something she may have posted on social media.
“It’s generally because of social media posts because there is no free speech here," Ibrahim Mouadi said.
He said he and the rest of the family have only been able to communicate with his sister through written messages passed to and from her by a lawyer.
"It's been really terrible. We miss her," he said.
Now that three Israeli female hostages have been released, Ibrahim Mouadi said he is hopeful he will be reunited with his sister as soon as Sunday night.
“I’m very excited," he said.
However, he said his sense of celebration is tinged with sadness because of the suffering that has occurred in Gaza.
-ABC News' Tom Soufi Burridge, Latifeh Abdellatif, Hugo Leenhardt
