Georgian Defence Ministry officials told the Associated Press that Russian troops had seized a military base in the town of Senaki, about 30 kilometres inland from the Black Sea.
A Georgian Interior Ministry spokesman said Russian forces also took over police stations in the town of Zugdidi, which is about 30 km from Senaki.
In Moscow, a government official, who spoke to the Associated Press on condition of anonymity because he wasn't authorized to give his name, said the move into Senaki was intended to end Georgian resistance.