Georgia has called for a ceasefire after Russian bombers widened an offensive to force back Georgian troops seeking control over the breakaway region of South Ossetia.
Georgia said 60 people were killed in Gori when Russian bombs hit residential buildings as well as military targets.
Russian officials said hundreds of civilians have been killed in the region, but Georgia denies the figure.
Russian officials say the death toll now stands at 2,000, with 30,000 refugees fleeing to Russia.
Georgia launched a surprise attack two days ago to regain control of South Ossetia, which has had de facto independence since the end of a civil war in 1992.
Russian Prime Minister Vladimir Putin has arrived in Vladikavkaz, close to Russia's border with Georgia, where fierce fighting is continuing between Russian troops and Georgian government forces.
Baltic EU members Estonia, Latvia, Lithuania and Poland have called on the European Union and NATO to oppose Russia's 'imperialist' policy towards Georgia, a statement said.
'The EU and NATO must take the initiative and stand up against the spread of imperialist and revisionist policy in the east of Europe,' the leaders of the four countries said in a joint statement.
A combined delegation of EU, US and NATO officials are travelling to Georgia to seek to broker a ceasefire in the conflict in the region, Britain's Defence Secretary Des Browne has said
Tensions in Abkhazia
Elsewhere, Russian warplanes have also bombed two villages in the Tbilisi-controlled part of the Kodori gorge, which cuts deep into Georgia's breakaway region of Abkhazia.
Raul Kiria, a spokesman for pro-Tbilisi Abkhaz government in exile, could not confirm if there were any casualties or damage.
However, Abkhaz separatists said their planes rather than Russian warplanes were bombing the area.
Tensions have risen over Abkhazia since Tbilisi sent troops yesterday to retake control over South Ossetia.
Both regions broke away from Tbilisi's rule after bloody wars in the early 1990s and rule out returning in any form.
Abkhazia has accused Georgia's pro-Western President Mikheil Saakashvili of moving security forces to the upper part of the Kodori gorge, a comfortable route for any invasion into the region.
Georgia has denied a military build-up, but made the Kodori gorge headquarters for a loyal Abkhaz government in exile.
