Last week Ahtisaari, a special envoy for talks on Kosovo, presented proposals on the future status of the breakaway Serbian province, including granting it internationally supervised sovereignty, but Serbian authorities strongly oppose the plan.
"Only three or four members of the UN Security Council have given their unconditional support to Ahtisaari's plan. The others had questions or doubts," Vitaly Churkin said.
He said Russia's concerns regarding the proposed territorial changes were shared by China, and several non-permanent UN members from Africa and Latin America.
Many UN Security Council members believe that negotiations should continue to find a compromise between both Kosovars and Serbs.
"We are not saying that Ahtisaari's plan should be discarded......it contains some very important and useful points," said Churkin.
The diplomat reiterated that Russia would not back the plan in its current form without agreement of both sides and called for further negotiations.
