Joyful crowds gathered in central squares in Damascus, waving the Syrian revolutionary flag in scenes that recalled the early days of the Arab Spring uprising, before a brutal crackdown and the rise of an insurgency plunged the country into a nearly 14-year civil war.
Others gleefully ransacked the presidential palace and residence after President Bashar Assad and other top officials vanished, their whereabouts unknown. Russia, a close ally, said Assad left the country after negotiations with rebel groups and had given instructions to transfer power peacefully.
Abu Mohammed al-Golani, a former al-Qaida commander who cut ties with the group years ago and says he embraces pluralism and religious tolerance, leads the biggest rebel faction and is poised to chart the country's future.
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The rebels face the daunting task of healing bitter divisions in a country ravaged by war and still split among different armed factions. Turkey-backed opposition fighters are battling U.S.-allied Kurdish forces in the north, and the Islamic State group is still active in some remote areas.
Syrian state television broadcast a video statement early Sunday by a group of rebels saying that Assad had been overthrown and all prisoners had been released. They called on people to preserve the institutions of "the free Syrian state." The rebels later announced a curfew in Damascus from 4 p.m. to 5 a.m.
The rebels said they freed people held at the notorious Saydnaya prison, where rights groups say thousands were tortured and killed. A video circulating online purported to show rebels breaking open cell doors and freeing dozens of female prisoners, many of whom appeared shocked and confused. At least one small child could be seen among them.
Rebel commander Anas Salkhadi, who appeared on state TV later in the day, sought to reassure Syria's religious and ethnic minorities, saying: "Syria is for everyone, no exceptions. Syria is for Druze, Sunnis, Alawites, and all sects."
"We will not deal with people the way the Assad family did," he added.
Celebrations in the capital
Residents of Damascus gathered to pray at mosques and to celebrate in squares, chanting, "God is great." People also chanted anti-Assad slogans and honked car horns. Teenage boys picked up weapons apparently discarded by security forces and fired into the air.
Revelers filled central Umayyad Square, where the Defense Ministry is located. Men fired celebratory gunshots and some waved the three-starred Syrian flag that predates the Assad government and was adopted by the revolutionaries.
"I cannot express my happiness," said Bassam Masr. "But this happiness will not be completed until I can see my son out of prison and know where is he. I have been searching for him for two hours. He has been detained for 13 years."
Soldiers and police left their posts and fled, and looters broke into the Defense Ministry. Videos showed families wandering into the presidential palace, with some emerging carrying stacks of plates and other household items.
Syria's al-Watan newspaper, which was historically pro-government, wrote: "We are facing a new page for Syria. We thank God for not shedding more blood. We believe and trust that Syria will be for all Syrians."
The newspaper added that media workers should not be blamed for publishing past government statements, saying: "We only carried out the instructions and published the news they sent us."
A statement from the Alawite sect - to which Assad belongs and which has formed the core of his base - called on young Syrians to be "calm, rational and prudent and not to be dragged into what tears apart the unity of our country."
The rebels mainly come from the Sunni Muslim majority in Syria, which also has sizable Druze, Christian and Kurdish communities.
Assad's whereabouts are unknown
Syrian Prime Minister Mohammed Ghazi Jalali said in a video statement that the government was ready to "extend its hand" to the opposition and turn its functions over to a transitional government. A video shared on Syrian opposition media showed a group of armed men escorting him out of his office and to the Four Seasons hotel on Sunday.
Rami Abdurrahman of the Syrian Observatory for Human Rights told The Associated Press that Assad took a flight Sunday from Damascus.
A senior diplomat from the United Arab Emirates, which had sought to rehabilitate Assad's image and has welcomed high-profile exiles in recent years, declined to comment on his whereabouts when asked by reporters at a conference in Bahrain.
Anwar Gargash said Assad's destination at this point is a "footnote in history," comparing it to the long exile of German Kaiser Wilhelm II after World War I.
Assad has been accused of war crimes and crimes against humanity during the war, including a 2013 chemical weapons attack on the outskirts of the capital.
Calls for an orderly transition
The rebel advances since Nov. 27 were the largest in recent years, and saw the cities of Aleppo, Hama and Homs fall in a matter of days as the Syrian army melted away. Russia, Iran and Lebanon's Hezbollah militant group, which provided crucial support to Assad throughout the uprising, abandoned him in the final days as they reeled from other conflicts.
The end of Assad's rule deals a major blow to Iran and its allies, already weakened by over a year of conflict with Israel. Iran, which had strongly backed Assad throughout the civil war, said Syrians should decide their future "without destructive, coercive, foreign intervention."
The Iranian Embassy in Damascus was ransacked after apparently having been abandoned.
Prime Minister Benjamin Netanyahu meanwhile said Israeli troops had temporarily seized a buffer zone in the Golan Heights established in 1974, saying the move was taken to protect Israeli residents after Syrian troops abandoned their positions. Israel captured the Golan in the 1967 Mideast war and later annexed it. The international community, except for the United States, views it as occupied.
The rebels are led by the Hayat Tahrir al-Sham group, or HTS, which has its origins in al-Qaida and is considered a terrorist organization by the United States and the United Nations.
Its leader, al-Golani, has sought to recast the group as a moderate and tolerant force. HTS set up a "salvation government" in 2017 to administer a large region in northwestern Syria under its control.
"Golani has made history and sparked hope among millions of Syrians," said Dareen Khalifa, a senior adviser with the International Crisis Group and an expert on Syrian groups. "But he and the rebels now face a formidable challenge ahead. One can only hope they rise to the occasion."
The U.N.'s special envoy for Syria, Geir Pedersen, called Saturday for urgent talks in Geneva to ensure an "orderly political transition."
The Gulf nation of Qatar, a key regional mediator, hosted an emergency meeting of foreign ministers and top officials from eight countries with interests in Syria late Saturday. The participants included Iran, Saudi Arabia, Russia and Turkey.
Majed al-Ansari, Qatar's Foreign Ministry spokesman, said they agreed on the need "to engage all parties on the ground," including the HTS, and that the main concern is "stability and safe transition."
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Sewell reported from Beirut. Associated Press writers Bassem Mroue, Sarah El Deeb and Kareem Chehayeb in Beirut; Samar Kassaballi, Omar Sanadiki and Ghaith Alsayed in Damascus; Jon Gambrell in Manama, Bahrain; Josef Federman in Doha, Qatar; and Tia Goldenberg in Jerusalem contributed.