The Russian Foreign Ministry on Monday expelled the Bulgarian military attaché, Lieutenant Colonel Mitko Borisov, in retaliation for the “unjustified” expulsion of a Russian diplomat from Sofia earlier this month.
In a statement issued on December 28, the Russian Foreign Ministry stated that it had summoned the Bulgarian ambassador Atanas Krystin and handed him a note declaring the Bulgarian military attaché Mitko Borisov as “persona non grata”.
The Bulgarian diplomat had 72 hours to leave the country.
The move came after Bulgaria expelled Russia’s military, air and naval attaché in early December and supported the prosecutor in Sofia that he had been involved in spying since 2017. Bulgaria in particular was accused of gathering information about the participation of US military personnel in exercises in Bulgaria.
The Russian diplomat is the sixth to have been expelled from NATO member Bulgaria since October 2019 on suspicion of espionage.