On November 25, the Russian Coast Guard ship Don rammed a Ukrainian tugboat, damaging the latter vessel’s main engine. The attack occurred while two Ukrainian small-sized armored artillery boats, the Berdyansk and Nikopol, and the tugboat Yany Kapu were being transferred from the Ukrainian Black Sea port of Odesa to Mariupol, in the Azov Sea, according to the Ukrainian Navy (Kyiv Post, November 25).