Russia officially recognized South Ossetia and Abkhazia on Tuesday despite Western warnings, saying the move was needed to protect the regions following Georgia's August 8 offensive against South Ossetia.
"We, the Foreign Ministers of Canada, France, Germany, Italy, Japan, the United States and the United Kingdom, condemn the action of our fellow G8 member," the statement, released by the U.S. State Department on Wednesday, said.
"We deplore Russia's excessive use of military force in Georgia and its continued occupation of parts of Georgia. We call unanimously on the Russian government to implement in full the six point peace plan brokered by [French] President [Nicolas] Sarkozy on behalf of the EU, in particular to withdraw its forces behind the pre-conflict lines."
Russia insists that it is in full compliance with the six-point peace deal, which allowed Russia to take extra security measures to prevent further violence. Three weeks on from the conflict, Russia maintains peacekeepers in a 'buffer zone' between Abkhazia and South Ossetia.
The ceasefire deal, signed by Russian President Medvedev, made no mention of Georgia's territorial integrity. Moscow has said Georgia lost its right to Abkhazia and South Ossetia when it launched its ground and air offensive against South Ossetia's capital, killing large numbers of civilians, mainly Russian nationals.
The Western diplomats' statement said Russia's recognition of the provinces "violates the territorial integrity and sovereignty of Georgia and is contrary to UN Security Council Resolutions supported by Russia."
The current standoff, in which ties between NATO and Russia have been frozen, has sparked media speculation that the seven leading industrial powers could oust Russia from the Group of Eight. However, the statement avoided any hint of such a move, and British Foreign Minister David Miliband stressed on Wednesday that there were no such plans.