> The captain claimed mechanical failure, but hull damage showed signs of an external strike consistent with a supercavitating torpedo.
> The Russian warship Ivan Gren soon arrived, demanded control of the site, and launched flares—likely to disrupt satellite surveillance. Shortly after, the Ursa Major disappeared from the surface. Seismographs recorded underwater explosions, and the ship sank to a depth of 2,500 meters.
whoa so what/who struck it?
