The reported downing of two unmanned Georgian spy drones over Abkhazia come as both sides accuse each other of preparing for war.
Ahead of a major summit April 2-4, Germany is leading the opposition against their accession.
A state of emergency remains in place, after protesters alleging election fraud were dispersed last week.
The pro-West president called Saturday's snap polls after being criticized for authoritarianism. With early results giving him 48 percent of the vote, opponents protest fraud.