"First of all, we have no evidence that the Russian are actually involved in trying to undermine our democratic processes at the moment… There is no doubt that they've been up to all sorts of dirty tricks… You've seen what happened in Montenegro where there was an attempted coup, in a European state, and possibly even an attempted assassination of the leader of that state," Johnson told the ITV broadcaster.
On October 16, 2015, on the parliamentary elections day in Montenegro, 20 people were detained and 14 of them arrested for planning to conduct attacks, targeting both civilian population and high-ranking statesmen, and to seize the parliament's building. In November, a Montenegrin prosecutor was quoted by the media as alleging that "nationalists from Russia" planned to overthrow a government.
Moscow has refuted the accusations, with Kremlin spokesman Dmitry Peskov calling the accusations unsubstantiated and irresponsible. Russian Foreign Ministry spokeswoman Maria Zakharova said the accusations of Russia's alleged involvement were baseless.
Johnson's comments come just days before his planned visit to Russia and the meeting with Russian Foreign Minister Sergey Lavrov.
Montenegro was invited to NATO in December 2015. In May 2016, NATO member states signed a protocol on Montenegro's accession to the alliance, which gives it the status of an observer at the meetings. To become a full-fledged bloc's partner, all 28 NATO countries must ratify the accession protocol to include the new member.