Russia's mission to the UN announced that the US is reinforcing terrorist group Hayat Tahrir Al-Sham positions in Idlib, north of Syria.

"Pretending to care about the Syrians, held against their will by the [former Nusra Front terror group, outlawed in Russia] terrorists in Idlib as a human shield, the US diplomacy uses the taxpayer money to effectively support the militants," the Russian mission said on Tuesday.

The mission added that the US is sparing no effort to "rebrand the Idlib cutthroats" in order to present them as an alternative to the Syrian government. It added that Washington is not only occupying the part of Syria near Al-Tanf, but Syria's entire northeast, meaning the "oil-rich and fertile region".

"By presenting itself as a ‘key donor,’ the US must consistent in its position and leave the illegally occupied territories, return the fertile lands across Euphrates River to Damascus and stop robbing the country by exporting the oil, extracted in Syria’s northeast, with truck convoys every month," it added.

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The statement called on the US to abide by its commitments to activate the mechanism for delivering humanitarian aid through the border to Syria, clarifying that the UN Security Council's decision means abiding by a number of commitments, chiefly by the United States since Russia has abided by its commitment to extend the work of the cross-border mechanism for another 6 months.

The UN Security Council had adopted a resolution in July last year to extend the mechanism to bring humanitarian aid into Syria through one border crossing for a six-month period, which would be extended later for another six months that would expire in July 2022, based on a report by the UN Secretary-General on transparency and developments in delivering the aid.