[daft]

Wreck divers Ocean X Team have found a sunken submarine of what looks like fairly modern design and it doesn't seem to be overgrown with underwater growth or silt. They also claim there is something that looks like cyrillic letters on the hull and all hatches are closed. It was found ~2.5km from the Swedish coast with it's hull apparently intact without any indications of damage.

All of this is just the initial impressions made by the dive team. Nothing has been confirmed.