The Syrian government collapsed after a surprise rebel offensive.
Rebel forces in Syria captured the capital Damascus and toppled the regime of President Bashar al-Assad in a lightning-quick advance across the country.
As Assad resigned and fled Syria, rebel forces moved into Damascus as citizens celebrated there and in the streets of Aleppo, where the rebel offensive began 11 days ago.
Meanwhile, the 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.
The Israel Defense Forces continued its intense airstrike and ground campaigns in Gaza, particularly in the north of the devastated Palestinian territory.
Tensions also 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.
Israeli Prime Minister Benjamin Netanyahu will hold a security meeting Sunday night to discuss the issue of the hostages, as well as Lebanon and Syria, an Israeli official told ABC News.
-ABC News' Jordana Miller
UNRWA Commissioner-General Philippe Lazzarini on Sunday announced a pause to Gaza aid deliveries via the strip's main crossing point, citing serious threats to the safety of staff.
The road out of the Kerem Shalom crossing "has not been safe for months," Lazzarini said in a post to X.
"This difficult decision comes at a time hunger is rapidly deepening," Lazzarini said. "The delivery of humanitarian aid must never be dangerous or turn into an ordeal."
The UNRWA chief said a "large convoy of aid trucks was stolen by armed gangs" on Nov. 16, with several more aid trucks taken on Saturday.
Lazzarini also said that Israel's "ongoing siege" of Gaza, "hurdles" put in place by Israeli authorities and "political decisions to restrict the amounts of aid" were among the other problems facing U.N. staff.
"The humanitarian operation has become unnecessarily impossible," he wrote. "The responsibility of protection of aid workers [and] supplies is with the state of Israel as the occupying power."
-ABC News' Somayeh Malekian
