Russian Coast Guard stops and searches five laden vessels in Kerch Strait heading from Ukraine’s Berdiansk, Mariupol Seaports, - journalist. MAP

Journalist Andrii Klymenko wrote on social media, Censor.NET reports.

"As for the crisis in the Sea of Azov: today, on May 31, 2018, between 4:40 and 5:30 a.m., the Coast Guard of the Russian Federal Security Service stopped five sea-going laden ships in the Kerch Strait that had left Berdiansk and Mariupol and were heading for destination ports... I'm getting tired of having to say it all over again but I have to: the office of the President of Ukraine has issued no diplomatic notes or statements so far," the journalist said.

Read more: Almost 150 vessels to be unable to enter Sea of Azov over Kerch Strait bridge, - Mariupol Seaport chief

Ukraine’s State Border Guard Service earlier said that the Russian invaders have been checking Ukrainian vessels and their crew members on the daily basis since April 30.