 Russia accused Georgia of trying to exploit the NATO support to solve the Abkhazia problem by force and of sending its troops into the Georgia-controlled upper Kodori Valley in northeast Abkhazia.However, the U.N. monitors in Abkhazia stated earlier in April they did not observe any military buildup on either side of the demilitarization line.On April 29, Russia announced it would increase its military presence in the region and threatened to retaliate militarily against Georgia's efforts.