"They may have been sunk or washed away. It is plausible that some or all of the trained dolphins have been freed," Sutton said.Russia has been actively fortifying Crimea, fearing that Ukraine could reclaim the territory annexed in 2014. As Ukraine often uses explosive sea drones (surface uncrewed vehicles) against Russian naval targets, Russia has heavily fortified the approaches to Sevastopol Harbor, hosting its main base of the Black Sea Fleet. Related:
- Train derailment in occupied Crimea obstructs rail line to Russia’s Black Sea Fleet base – UK intel
- Fire at oil depot in occupied Sevastopol element of preparation for counteroffensive – Military official