Seven of the world's leading industrialised nations have jointly condemned Russia's decision to recognise Georgia's breakaway regions.
Canada, France, Germany, Italy, Japan, the US and UK said Moscow's recognition of South Ossetia and Abkhazia violated Georgia's integrity and sovereignty.
Earlier, the UK's foreign secretary said Western countries should re-examine their relations with Russia.
David Miliband also warned Russia not to start a new Cold War.
Speaking during a visit to Ukraine, Mr Miliband said Moscow had not reconciled itself with the new map of the region and that the West should look at ways to reduce its dependence on Russian oil and gas.