I wonder who took those photos of the ship and how they ended up in the hands of the Ukrainians? I'd have thought that only Russian ships would be be allowed to get close to the scene of the disaster, in which case someone Russian leaked them.
Or maybe the Turkish coastguard was involved in rescuing some of the survivors?
Novaya Gazeta claims to have seen photographs sent from one of the sailors to his mum. He also apparently told her about conditions on the ship, severed limbs and such. If that got out, there's no reason someone on another ship couldn't have taken photos and sent it to their mum, who showed them to media.