KYIV, Nov 29 — The Ukrainian ports of Mariupol and Berdiansk in the Sea of Azov have been blocked by the Russian Federation for entry and exit of vessels; a total of 35 ships have been blocked, Ukraine's Infrastructure Minister Volodymyr Omelyan has said.

"As of November 28 night, the Ukrainian ports of Mariupol and Berdiansk in the Sea of Azov have practically been blocked by the Russian Federation for entry and exit of ships," the minister wrote on Facebook on November 28.