The HQ of Russia's Black Sea Fleet, including the naval aviation, considers the option of the permanent presence in the Sea of Azov and the northeastern part of the Black Sea. An informed source in the Russian military told that to RIA Novosti news agency.

'The aggressive actions of Ukrainian naval border guards in the international waters pose the danger of capturing Russian vessels and shaping the state-backed piracy', the source said.

Georgiy Muradov, the so-called 'Vice Prime Minister' of the Crimean 'government' said that Russia has been taking measures, responding to the detention of the Russian ship by Ukraine.

'The detention of the vessel may be equaled to the act of piracy, since it was detained in the waters of general usage in the Sea of Azov. The detention is an explicit provocation by Ukraine, which joined the aggressive anti-Russian actions of the West and tries to escalate tensions in our relations. If Russia does not take a tough position in this regard, the story will become a precedent, so such actions may repeat in other maritime areas', he said.

On March 25, Ukrainian border guards detained Nord, a fishing vessel, which waved the flag of the Russian Federation. It violated the maritime law of Ukraine, abusing the procedure of leaving the temporarily occupied territory of Ukraine (Crimea, - 112 International). The vessel appeared to be registered in the annexed Crimea; all crew members held the so-called 'Russian passports', actually issued to them in Crimea.