Russia on Friday accused six British diplomats of spying and said it decided to expel them. The UK said the “completely baseless” move came weeks ago and was linked to its action in May to revoke the credentials of an attaché at the Russian Embassy and limit Moscow’s diplomatic activities in London, AP reported.

Russia’s Federal Security Service said in an online statement that the Foreign Ministry withdrew the British envoys’ accreditations, and Russian TV quoted an FSB official as saying it was decided to expel them.

The FSB said it received documents indicating the diplomats were sent to Russia by a division of the UK's Foreign Office “whose main task is to inflict a strategic defeat on our country,” and that they were involved in “intelligence-gathering and subversive activities.” It did not identify the six diplomats.

The FSB warned that if other diplomats are found to be carrying out “similar actions,” it “will demand early termination of their missions” to Russia.

Russian TV said the six diplomats had met with independent media and rights groups that have been declared “foreign agents”.

Foreign Ministry spokesperson Maria Zakharova said in a statement that the diplomats were carrying out “subversive actions aimed at causing harm to our people.”

“We fully agree with the assessments of the activities of the British so-called diplomats expressed by the Russian FSB,” she added in an online statement. “The British Embassy has gone far beyond the limits outlined by the Vienna Conventions.”