Bulgaria Links Black Sea Drone Strikes to Russia, 11 Sailors Missing

• Bulgaria summoned the Russian ambassador following the drone attacks on two ships in the Black Sea.
• The Guinea-Bissau-flagged cargo ship Dignity sank after being hit by a military strike.
• Eleven sailors are missing after the attack on the merchant vessel near Bulgarian waters.
• Rescue operations are ongoing, but there is no way to prove Russia's involvement.
• Bulgaria expects to join NATO's anti-drone initiative this month.