More than 30 Syrian moderate rebel groups led by the "Free Syrian Army" have signed a statement in Amman, Jordan saying that the escalation of bombings involving Russian aircraft in Aleppo defeats the purpose of further political negotiations.

Russian BBC Service reports that the groups supported by Turkey, the Gulf and Western countries find no sense in negotiation process under the UN aegis with the participation of the United States and Russia.

The Syrian opposition stated that the insurgents can not agree on the role of Russia as a sponsor of the negotiations, due to its cooperation with the Assad regime, that commits crimes against their own people.

The opposition accuses Syrian army of supporting Russia in making use of napalm and chemical weapons.

The collapse of the Syrian truce became a subject of fierce debate in the UN Security Council. The United States accused Russia of "barbarity" in the guise of combating terrorism, and the United Kingdom blamed RF for "war crimes".

Moscow's UN ambassador Vitaly Churkin said that the restoration of peace has become "almost an impossible task."

Army of the Moscow-backed President Bashar al-Assad launched an offensive on Friday. Syrian Aleppo was bombed with unprecedentedly particular fierce, according to eyewitnesses. The hostilities buried hope to ceasefire announced by the US Secretary of State John Kerry and the Russian Foreign Minister Sergey Lavrov.

PHOTO: Reuters