Evidence has been uncovered in Syria that implicates President Bashar al-Assad and members of his inner circle in war crimes and crimes against humanity, a top UN official says.
The allegations came on Monday as Syrian rebels, including jihadists, captured the historic Christian town of Maalula north of Damascus, according to the Syrian Observatory for Human Rights, a Britain-based monitoring group.
A UN probe into rights violations committed during 33 months of brutal conflict "has produced massive evidence ... (of) very serious crimes, war crimes, crimes against humanity", United Nations human rights chief Navi Pillay said in Geneva.
"The evidence indicates responsibility at the highest level of government, including the head of state."
It is the first time evidence by a UN-mandated commission has directly implicated Assad in crimes committed during Syria's civil war, which has killed an estimated 126,000 people, according to new figures released by the Observatory.
The four-member UN investigative team, which has been probing rights violations since shortly after fighting broke out, has accused both the regime and the rebels of war crimes.
For the first time however, they have now cobbled together a long and confidential list of suspected perpetrators.
With no access to Syria, the investigators had to rely on more than 2000 interviews in neighbouring countries or by phone or Skype.
Pillay told reporters in Geneva the names would remain sealed until they could be provided to a "credible" national or international investigation, and reiterated her call for the case to be handed over to the International Criminal Court in The Hague to ensure accountability.
"The scale of viciousness of the abuses being perpetrated by elements on both sides almost defies belief," she said.
Pillay warned that efforts to destroy Syria's massive chemical weapons stockpile should not distract from the tens of thousands of killings with conventional weapons.
The Syrian Observatory, which relies on a network of activists, lawyers and doctors on the ground in Syria, said on Monday it had documented 125,835 deaths in the conflict up to December 1.
The dead include 44,381 civilians, among them 6627 children and 4454 women.
Adding to Syria's misery, more than one million people are now going hungry because fighting and checkpoints have hindered the delivery of aid, the Red Cross said on Monday.
Under a US-Russia deal that headed off US military strikes against Assad's regime after a massive chemical attack earlier this year, Syria is to destroy its chemical arsenal by mid-2014.
While inspectors from the Organisation for the Prohibition of Chemical Weapons (OPCW) have sealed more than 1000 tonnes of chemical weapons, the UN official charged with their destruction warned on Monday the hardest part is yet to come.
Speaking at an annual meeting of OPCW member states in The Hague, Sigrid Kaag said "the removal of Syria's chemical agents for destruction outside of its territory will require tremendous coordination and collective effort".