The UN Security Council blacklisted the terrorist al-Nusra Front on Thursday as an alias of al-Qaeda movement in Iraq.
The US mission to the United Nations told media outlets that none of the 15 council members objected to blacklist al-Nusra.
The UN decision will subject the group to sanctions including an arms embargo, travel ban and assets freeze, diplomats said.
Last month, al-Nusra pledged allegiance to al-Qaeda leader Ayman al-Zawahri. It is one of the most effective forces fighting the Syrian government taking advantage of internationally banned chemical weapons.
The group claimed responsibility for the fatal bombings targeting civilians and government institutions across Syria, and its militant mercenaries have joined other Syrian insurgent brigades.
Syria had urged the UN Security Council in late April to list the radical group al-Nusra Front as a terrorist one, but Britain and France countered with a proposal to list it as an alias of al-Qaeda instead.
Videos of executions and torture arried out by al-Nusra militiamen have become increasingly common in online media.
Syria was hit by a violent unrest since mid-March 2011, where the Syrian government accuses foreign actors of orchestrating the conflict, by supporting the militant opposition groups with arms and money.
Source: Al Manar