The head of Russia's second-largest bank, VTB, warned that Moscow would retaliate and pursue litigation for 50 years if the European Union seizes its frozen assets.
Two "shadow ships" under international sanctions for transporting Russian oil suddenly exploded and caught fire in the Black Sea, though the cause remains unclear.
A Russian court has sentenced eight defendants to life imprisonment in connection with the 2022 explosion that damaged a section of the Crimea Bridge and killed five people.