A large number of naval mines were last month detected in Black Sea coastal areas. Kyiv accused Russia of laying the mines to blockade Ukraine’s sea ports, saying that they were the same type that had been stored at a Sevastopol armory that was seized by the Russian military during its annexation of Crimea in 2014.
The Kremlin in turn accused Ukraine of laying more than 420 mines in the Black Sea to keep Russian warships from reaching its ports.
While neither side has claimed responsibility, drifting mines have appeared in the Bosphorus Strait — a major commercial shipping lane that connects the Black Sea to the Mediterranean Sea and the Atlantic Ocean. Fishing vessels registered to a number of regional nations, including Bulgaria, Romania, Turkey and Ukraine, have reported discovering mines in the Bosphorus, which led to the waterway being temporarily closed at the end of last month.