Russian troops and armour remain near at least three Georgian towns despite promises to withdraw from the country.
It is understood that Russian troops remain present near the key central Georgian town of Gori and outside the western town of Zugdidi.
Residents in the Black Sea port of Poti have also reported a Russian incursion.
In Moscow, the Russian General Staff said it was legitimate for 'Russian peacekeepers' to be in Poti and for what it termed 'reconnaissance parties' to be in Gori, two days after Russia signed up to a French-led peace plan to stop the fighting.
Georgia has accused Russian forces of destroying installations in several towns in Georgia.
A Russian general in the area said Moscow's troops would remain nearby for several days to remove weaponry and help restore law and order in the area.
Russian armed forces have occupied parts of Georgia since repelling a Georgian attack last week on the tiny pro-Russian separatist territory of South Ossetia.
The territory broke away from Georgia in the 1990s.
The conflict has affected oil markets, reliant on pipelines through the Caucasus for Caspian oil, and alarmed the West, which fears it could spiral out of control.
It has also prompted strong criticism from the US. It has seen its recent pre-eminence in world affairs directly challenged by Russia, which analysts believe is serving notice that the days of automatic deference to Washington's desires are over.
Russia has long complained about US 'double standards' it says allow the US to act as it chooses in world affairs with impunity while demanding others respect rules of conduct.
In the current crisis, Russia has evoked terms like 'genocide' and 'ethnic cleansing' to justify its actions that unmistakeably echo US language in past conflicts from the Balkans to Iraq.
Following talks with French President Nicolas Sarkozy, US Secretary of State Condoleezza Rice warned today that it is time for the crisis to be halted.
Ms Rice will take a set of documents to the Georgian capital, Tbilisi, aimed at consolidating the EU-brokered ceasefire and leading to a withdrawal of Russian troops.
Meanwhile, the US State Department has confirmed that a second C-17 US military cargo plane carrying humanitarian assistance has arrived in Tbilisi.
Over the past few days the US has flown in $2m in humanitarian aid in the form of medical supplies, tents, blankets and water.
The International Committee of the Red Cross has also received the green light to assist the civilian population in South Ossetia, but says security concerns remain.
The agency has been seeking to bring vital aid supplies into the rebel Georgian region, where it says tens of thousands of civilians require assistance and protection after a week-long conflict.
