A swimmer off the coast of Pieria, near Thessaloniki, discovered an old, corroded naval mine. The ordnance was found at a shallow depth of 1.5 meters and approximately ten meters from the shoreline. Authorities have been notified and are responding to the situation. The mine’s age and condition suggest it is likely a relic from past conflicts. Precautions are being taken to secure the area and prevent potential hazards to swimmers and boaters. Experts are expected to assess the mine and plan for its safe removal. This discovery highlights the ongoing presence of unexploded ordnance in Greek coastal waters.