Tensions between NATO and Russia continue to rise as Moscow is accused of carrying out “increasingly more blatant and aggressive” hybrid actions.
A similar behavior, EstoniaForeign Minister Margus Tsahkna said: calls for a response.
Mr Tsahkna sounded the alarm bells at a Foreign Affairs Council meeting in Brussels on May 27, when he gave an overview of Russian activities on his country's eastern border.
One of the latest, most worrying moves from Russia against Estonia, which is a member of NATO, was Moscow's removal of 24 of the 50 buoys marking the border between the two countries on the Narva River.
The removal of these buoys on May 23, which were placed to mark shipping lanes and prevent boats from straying into foreign waters, appeared to be part of a “broader pattern of action” by Moscow to use “instruments related to the border” to create fear and anxiety. said Estonian Prime Minister Kaja Kallas.
Its minister, Mr Tsahkna, argued on Monday that the move will not only affect the country, but also the supranational groups it is part of.
He said: “Russia removed the border markings from the border of not only Estonia, but also NATO and the EU.
“Russia's hybrid actions are becoming increasingly blatant and aggressive and we must respond.”
The removal of the shackles was labeled “unacceptable” by EU foreign policy chief Josep Borrell.
He said last week: “This border incident is part of a wider pattern of provocative behavior and hybrid actions by Russiaalso at the sea and land borders in the Baltic Sea region.”
Estonia is one of the countries on NATO's eastern flank it was feared to be one of Russia's next targets.
In February, Ms Kallas claimed her country's security service had broken up a Russian hybrid operation damaging property, damaging monuments and attacking Interior Minister Lauri Läänemets' car.