Unconfirmed earlier news mentioned video footage from surveilance cameras on one or more summer houses on the shores of the lake, seemingly showing the aircraft making an approach towards the lake. It didn't mention whether this was the actual ditching, or an attempt of a touch and go on the thin ice covering the surface.
Latest news is that three of four bodies rescued. Boats had to be used to break and clear the rapidly forming ice on the lake (temps -10 or less). Original plan was to use divers, but had to be abandoned due to the conditions. A submarine with a robot arm was used to retrieve the deceased. There is a possibility the aircraft will be raised tomorrow.