Ukrainian News: Estonia wants to block Baltic Sea for Russia
Estonia, which is a member of the North Atlantic Treaty Organization (NATO), is considering the possibility of effectively blocking the passage of Russian ships through the Baltic Sea.
Estonia's introduction of a so-called contiguous zone, which can be up to 12 nautical miles from the 12-mile territorial sea, allows the country to conduct searches in the Gulf of Finland on military ships and civilian vessels to monitor compliance with Estonian law.
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Update #1: Estonia may block the Gulf of Finland for Russian ships (map) (The Saxon)
Update #2: Estonia plays on Russia's nerves by closing the Gulf of Finland (Pravda.ru)
WNU Editor: Russia has responded .... Estonia has no right to impede navigation in Gulf of Finland contiguous zone — ambassador (TASS).
As to what is my take. Russia will immediately challenge such a blockade.