KYIV, Dec 5 - The Belarusian defense ministry said on Sunday it had summoned Ukraine's military attaché to protest against what it called repeated violations of Belarus' airspace by Ukrainian aircraft, Reuters reported.

Relations between the two countries have plummeted since last year, when Russia sided with Belarusian President Alexander Lukashenko during mass street protests and Lukashenko in turn became more vocal in his support for Moscow against Ukraine.