The presidents of Poland, Lithuania, Latvia and Estonia condemned Saturday in a joint statement the actions of Russian forces fighting in the breakaway Georgian region of South Ossetia, dpa reported.
The declaration was "sharp, but the situation calls for it," Polish President Lech Kaczynski told journalists in Warsaw.
He described the Russian intervention as incompatible with international law and an "act of aggression."
South Ossetia and Abkhazia, another separatist region to Georgia's east, are part of the republic of Georgia and "nothing can change this," Kaczynski said.
The four states called on all NATO and European Union members to "react accordingly" to the crisis. Kaczynski called for more than "insignificant statements."
Poland has been lobbying for Georgia's entry into NATO and the EU.