Foreign countries stepped up efforts Sunday to establish contacts with Syria's interim rulers, a week after Islamist-led rebels sent president Bashar al-Assad fleeing to Moscow, ending decades of brutal rule.
The United Nations special envoy for Syria was among those arriving in the Syrian capital, where he pressed for "justice and accountability for crimes".
"And we need to make sure that that goes through a credible justice system, and that we don't see any revenge," Geir Pedersen said.
He later met rebel leader Abu Mohammed al-Jolani, the rebels' Telegram channel said.
A Qatari delegation also landed in Syria to meet transitional government officials.
They reaffirmed the Gulf emirate's "full commitment to supporting the Syrian people... following the success of their revolution," Qatar's foreign ministry spokesman told the emirate's official news agency.
Qatar's embassy is set to resume operations Tuesday, 13 years after it closed in the early stages of the anti-government uprising that turned into years of civil war.
Unlike other Arab countries, Qatar never restored ties with Assad's Syria.
- Aid and diplomacy -
Turkey, a major player in Syria's conflict which holds considerable sway in the northwest, reopened its Damascus embassy on Saturday after 12 years.
And Britain's foreign minister said London had established diplomatic contact with the Hayat Tahrir al-Sham (HTS) rebel group that led the offensive that ousted Assad.
They remain "a proscribed terrorist organisation, but we can have diplomatic contact and so we do have diplomatic contact," said David Lammy who also announced an aid package for Syrians.
Washington's top diplomat Antony Blinken said his country has made "direct contact" with HTS, despite having designated the group as terrorists in 2018.
A French diplomatic team is due in Damascus on Tuesday to "retake possession of our real estate" as well as "establishing initial contact" with the new authorities, said acting Foreign Minister Jean-Noel Barrot.
They would also be "evaluating the urgent needs of the population", he added.
- Torture, death threats -
Assad fled Syria on December 8 following an 11-day rebel offensive led by HTS, after years of civil war sparked by his violent crackdown on anti-government protests in 2011.
The war has killed upwards of 500,000 people and displaced more than half the country's population.
Since the rebels took Damascus, ex-prisoners such as Ghazi Mohammed al-Mohammed have shed light on the abuse he and others like him suffered.
"Towards the end I just wanted to die, waiting for when they would execute us," said Mohammed, who was among those freed by the rebels from the prison system Assad used to quash any hint of dissent.
Mohammed said he doesn't know why he was arrested and spent more than five months in prison, where he says he was tortured and threatened with death.
- 'Massive destruction' -
Calm is slowly returning to the streets of Damascus, with children streaming back to school Sunday for the first time since Assad fled.
An official at one school said "no more than 30 percent" had returned, but that the numbers would "rise gradually".
Damascus's interim governor said major obstacles lay ahead.
"The challenges we are facing right now are the massive destruction of the institutional structure in terms of human resources, local economy, and the social structure," said Maher Marwan.
"This is a reality that requires great effort and awareness, in addition to solidarity by everyone at this phase."
UN envoy Pedersen called for "increased, immediate" aid to war-ravaged Syria during his Damascus visit.
Turkey was ready to provide military support to the new Islamist-led government set up by the rebels, if requested, Defence Minister Yasar Guler said Sunday, Turkish media reported.
The new leadership should be given "a chance", he added. Ankara was "ready to provide the necessary support" if needed.
Sunni Muslim HTS is rooted in Syria's branch of Al-Qaeda and has sought to moderate its rhetoric in recent years.
But its seizure of power has sparked widespread concern over the protection of religious and ethnic minorities.
On Sunday, Syrian Christians attended their first church service since Assad's fall.
The interim government insists the rights of all Syrians will be protected, as will the rule of law.
- Russian evacuation -
Assad was propped up by Russia, Iran and Lebanon's Hezbollah militant group.
Russia's foreign ministry said it had evacuated some of its diplomatic staff from Syria Sunday, "by a special flight of the Russian Air Force from the Hmeimim airbase" in Syria.
The rebel advance began on November 27, the day a ceasefire took effect in the Israel-Hezbollah war in Lebanon, in which Assad's ally suffered staggering losses.
Both Israel and Turkey have carried out military strikes inside Syria since Assad's fall.
Despite his country carrying out hundreds of strikes over the past week, Israeli Prime Minster Benjamin Netanyahu said "we have no interest in confronting Syria."
"Israel's policy toward Syria will be determined by the evolving reality on the ground," he said in a video statement.
Early Monday, the Syrian Observatory for Human Right reported that Israeli strikes had targeted military sites in the country's coastal Tartus region.
The bombardment is "the heaviest strikes" in the area in more than a decade, said the UK-based Observatory which relies on a network of sources in Syria.
Israel has also ordered troops into a UN-patrolled buffer zone separating Israeli and Syrian forces on the Golan Heights, a move denounced by Saudi Arabia and Qatar, and which the UN said violated a 1974 armistice.