Moscow will take tit-for-tat measures in response to the Greek expulsion of Russian diplomats, a Russian Foreign Ministry official said Wednesday.
According to media reports, Greece has decided to expel two Russian diplomats and ban another two from entry due to their alleged illegal actions against the country's national security.
There was no immediate comment on the reports from Greek authorities.
Earlier this year, over two dozen Western countries had expelled a total of around 150 Russian diplomats over an alleged nerve agent attack against a former Russian spy in Britain.
Moscow responded with equivalent measures in the rare diplomatic spat, bringing Russia-West relations to a new low.
Greece to expel two Russian diplomats, and ban the entry into Greece of two others, accusing them of intrusion into domestic affairs as well as for illegal acts against national security, Greek newspaper "Kathimerini" (Daily) reported on Wednesday.
Athens is accusing the Russian diplomats of efforts to extract and circulate information, and to bribe Greek state operatives, which have failed, according to the report which cites high-level Greek diplomatic sources.
Greek authorities has not commented so far.
"The case brings to the forefront the tension that seems to have been brewing between Athens and Moscow over the last two years, for reasons that have to do with regional security," the newspaper said.