Update on this just released by the Russian CAA…
The crew went around from their first ILS approach due to lack of visual references. They decided to divert to their alternate (i.e. return to Bishkek) but soon after received indications of the failure of the right hand engine combined with the failure of two hydraulic systems. The crew shut the right hand engine down and decided to perform an emergency landing in Osh despite weather being below minima.
The aircraft touched down very hard about 1400 meters past the threshold of runway 12, the gear collapsed and the aircraft skidded on its belly and engines to a halt 500 meters further down the runway. The occupants evacuated via slides, 10 occupants received injuries of various degrees, 4 received serious injuries.
Full details here
The heavy landing now seems more understandable if they were trying to shoot an ILS in 50m of fog, engine out and in manual reversion.