"He was given a note of protest and told that in response to Montenegro's unjustified demands to expel a Russian diplomat on the basis of Britain's unproven accusations against Russia over the so-called 'Skripals case', the Russian side declares an employee of the Montenegrin embassy persona non grata," the Russian ministry said in a statement.
READ MORE: Portugal Recalls Envoy to Russia for Consultations Over Skripal Case — Lisbon
The UK side claims that Skripal, a former Russian intelligence agent who moved to the UK and worked for the MI6, and his daughter Yulia were exposed to a nerve agent in the UK city of Salisbury. According to the British version of the case, it was an attack organized by Russia.
Russian officials, in turn, have refuted all these allegations and pointed out that London has not contributed any facts to confirm its claims, refusing to provide the case materials to Moscow.