STOCKSHOTS Ukraine says Russia rams navy tugboat off Crimea Ukraine's navy say that Russia's border guards rammed one of its tugboats in the Black Sea off Moscow-annexed Crimea in "openly aggressive actions." The Sea of Azov is located in a zone of heightened tensions between Russia and Ukraine: on the border of the Crimean peninsula annexed by Russia and the Kremlin-backed rebel regions of eastern Ukraine. STOCKSHOTS of Port Mariupol in the Sea of Azov