Looks like nothing really definitive so far, and I feel like this is just hanging.
Dug through some MSM news reports for a little more info on the victims, maybe this will help:
>Lyudmila Kovchuga, 53, Doctor
>Ulrich Klaeui, Swiss oil engineer for Burckhardt Compression
>Sergei Ilyin, ice hockey player
>Ilya Poletayev, student
>Vladimir Normantovich, 60, petrochemical engineer for Orsknefteorgsintez
>Alexander Normantovich, 37, also worked at Orsknefteorgsintez
>Ilya Stavskiy, 33, ‘from the Urals’, died on birthday
>Antonina Kuzupitsa, 56, head of Orsk city finance dept.
>Viktor Anokhin, owner of Orsk central market
>Zoya Anokhin, his wife
>Evgeny Korotkov, working on oil or gas pipeline in Orsk