Ukraine's delegation to the Organization of the Black Sea Economic Cooperation (BSEC) left a BSEC session as Russia took over the chair of this organization, Ukrainian Consul General to Istanbul Vasyl Bodnar has said.

"The delegation of Ukraine staged a diplomatic demarche in light of the start of Russia's chairmanship of the BSEC," Bodnar wrote on his Twitter page on Friday.

The BSEC meeting was held in Istanbul.

Among other matters, it was noted that, by reconnecting with Crimea, "Russia violated both international law, the territorial integrity of Ukraine and the BSEC fundamental principle on 'turning the Black Sea region into a region of peace, stability and prosperity'," the consul general said.

"A number of BSEC member states supported Ukraine's position," he added.