Members of two families perished and others are missing as emergency services scrambled to the scene.
A murder probe had been launched after Stepan Ludannyi went missing.
Four people killed, six missing, 46 injured in Siberia after a river boat crash which was caused by a drunk captain, claimed police.
Seven year old sparked full scale police inquiry but had simply lost track of time as he read good books.
More than eighty rescue workers and a helicopter are involved in the hunt for the boys in sub-zero temperatures.
Parents' nightmare as mystery middle-aged man takes little Vika in Tomsk.
Thousands of volunteers had joined search for three year old girl in Tomsk.
A desperate hunt for six teenagers missing on a Tyva mountain was hampered in poor weather conditions including the threat of new avalanches.
Miracle survival for Liza Grabovskaya in temperatures of minus 12C, lost for 24 hours.
A day of mourning will be held on Thursday for the victims of a fatal five metre high avalanche that struck a group of seven teenagers.