GORI, Georgia — Russian troops entered a breakaway region of Georgia on Friday after Georgian forces pushed into the capital of the pro-Russian enclave, in a sharp escalation of the longstanding conflict.
Russian Prime Minister Vladimir V. Putin declared that “war has started” and President Mikheil Saakashvili of Georgia accused Russia of a “well-planned invasion," saying he had mobilized Georgia’s military reserves.
Reports conflicted Friday about whether Georgian or Russian forces had won control of the capital of the rebel province, South Ossetia. It was unclear late Friday whether ground combat had taken place between the two sides in the capital, Tskhinvali.
Georgia accused Russia of unleashing an air bombing campaign and claimed that hundreds of civilians had been killed; Russia denied those accusations.