Russia has declared 10 Bulgarian diplomats persona non grata, with a note that was handed to the Bulgarian ambassador Atanas Kristin.
The measure is in response to the expulsion of ten Russian diplomats from Bulgaria in March.
The office of Bulgarian foreign minister, Teodora Genchovsk, confirmed the information.
The employees at the Russian Embassy in Sofia were expelled for actions incompatible with the Vienna Convention.
related:
Record-Low Danube Water Levels Bring River Navigation to a Standstill (PHOTOS)
The Trial Against Iva Mihaylova in Kocani: Once Again, She Was Not Allowed to Receive Medical Treatment in Bulgaria