Vessel 'holed by drifting ice', says regional Emergency Ministry source.
Fate of 13 still unknown as rescue efforts continue.
Murky underwater videos suggest wreckage of Eira is finally rediscovered off Cape Flora on Franz Josef Land archipelago, where it sank in 1881.
Major discovery of Ben Leigh Smith’s vessel which sank off Franz Josef Land in 1881 sandwiched between two giant icebergs.