Ukrainian military: 'During the night of July 11th, as part of efforts to reduce the military-economic potential of the Russian aggressor, units of the Ukrainian Defense Forces struck at enemy vessels in the Sea of Azov. Specifically, 21 tankers belonging to the Russian Federation were damaged. These tankers are used to transport oil and petroleum products, circumventing international sanctions, and provide funds to finance the armed aggression against Ukraine. In addition, four tugboats, two cargo ships, and a dredging vessel were also damaged. These vessels are used by the enemy for military logistics, transporting cargo, and supporting port infrastructure operations.'