NEW: Five Azerbaijani sailors were killed when Ukrainian drones struck two grain carriers in the Azov Sea overnight. The Natra lost two crew members after taking four hits; the Zircon lost three, caught fire, and was abandoned — it's still burning. Twenty-one survivors were rescued by passing vessels. Both ships were privately crewed Azerbaijani contractors sailing under foreign flags to a Russian port to load grain. This is the first confirmed Azerbaijani fatalities in Azov Sea drone strikes.