Here is a concise original summary based on the information published by the source. Greek container ship sinks after drone attack off Bulgaria ReutersNaval Drones Sink Israeli-operated Cargo Ship Off Bulgaria's Black Sea Coast i24NEWSNATO’s Black Sea nations decry Ukraine war spillover endangering commercial ship traffic Defense NewsZIM-operated ship sinks in Black Sea after drone strike Globes - Israel Business NewsContainership Struck Off Bulgaria as Ministers Meet to Increase Security The Maritime Executive For the full context and any later updates, use the original source link.