UNITED NATIONS — Russia is ratcheting up its support for two separatist movements in neighboring Georgia, with the Russian ambassador the United Nations saying his country’s warnings of “negative consequences” over Kosovo’s independence are now materializing.

Yesterday, Russia withdrew its support for weapons sanctions against Abkhazia and South Ossetia, which are seeking independence from Georgia. The prospect of Russia sending arms to its allies in those regions is “most alarming,” the American ambassador to the United Nations, Zalmay Khalilzad, told reporters.

Moscow also made clear yesterday that it would provide more support to two regions if Georgia becomes a member of NATO. “As soon as Georgia gets some kind of prospect from Washington of NATO membership, the next day the process of real secession of these two territories from Georgia will begin,” the Russian ambassador to NATO, Dmitry Rogozin, said, Reuters reported.

“We support Georgia’s future as a member of the transatlantic community. Georgia is not alone,” Mr. Khalilzad said. “Most alarming is the prospect that Russia’s withdrawal from sanctions could lead the way to arms transfers to the separatists.”

“All our warnings about the negative consequences of a unilateral declaration of independence” in Kosovo “are bearing out,” Ambassador Vitaly Churkin said. “We see separatist tendencies in certain parts of the world strengthened.”

A Western official said that in diplomatic discussions, Russia was careful to avoid making a direct link between the former Yugoslavia and Georgia. Nevertheless, Moscow is implicitly using Kosovo’s break from Serbia, a Russian ally, to further its interests in Georgia, where the separatists are Russian allies, the diplomat, who requested anonymity, added.

“I don’t think there is a parallel” between Kosovo and Georgia, the British ambassador to the United Nations, John Sawers, told The New York Sun. “There are reasons for concern about the latest developments in Georgia,” he added, saying efforts to resolve the dispute through negotiations “within the framework of Georgia’s territorial integrity” are under way.

Russia and Serbia have argued that Kosovo’s declaration of independence last month was illegal, but America and top Western European powers recognized the new state, saying the declaration was based on a blueprint proposed by the United Nations.