US-backed Syrian rebels said a peace deal will have little meaning till the time bombing in Aleppo is stopped.
Aleppo, Syria's largest city, has been bombed severely in the last few days by Russia-supported Syrian government.
More than 30 rebel groups, including those backed by Turkey, Gulf states and the West, said the "unprecedented" bombing of the past few days would undermine the significance of any peace deal brokered by Russia and the US in the coming days.
The statement also expressed the rebels' wariness about the West's attempt to forge a peace deal with Russia.
"It (Russia) is a partner with the regime in its crimes against our people," the statement read.
The statement also accused Syrian forces of using napalm and chemical weapons in the war against them.
The rebels' apprehension comes close on the heels of Britain, France and the US on Saturday requesting for an urgent United Nations Security Council meeting on the escalating campaign in Aleppo. The meeting is said to be held later today.
More than 300,000 people have lost their lives since the Syrian war broke out in 2012.
(WION with inputs from Reuters)