Japan's Defense Ministry said two Russian fighter jets briefly intruded Thursday into Japanese airspace as the country was holding rallies demanding that Moscow return a group of disputed islands.
Japan's Foreign Ministry lodged a protest with the Russian Embassy in Tokyo. Russia, however, denied any border violation. Defense Ministry official Yoshihide Yoshida said it was not immediately known whether the incident was intentional or accidental, but that it was "extremely problematic." The last intrusion by Russian jets in Japanese airspace was on Feb. 9, 2008, he said. (AP)