Probe into gas blast at Achinsk refinery in the Krasnoyarsk region.
'The fate of three people is currently unknown'. Picture: Yulia Lebedeva, Channel 7 Krasnoyarsk
Seven other victims were hospitalised as a result of the tragedy which saw a fire sweep through the oil refinery.
'As a result of the fire five people were killed,' the Investigative Committee said in a statement. 'The fate of three people is currently unknown'.
The Siberian refinery is owned by state oil giant Rosneft.
The refinery processes 140,000 barrels a day and the blast was in a 'fractionation unit'.
Parents concerned about their children from huge wild cat - or more than one - on the loose, with another terrorising Solontsovy village.
Grandfather Egor Tarasov's 'miraculous' survival story of 42 days alone in the tundra with polar and brown bears, and wolves.
'Aggressive' crew resisted border patrol ship after being caught fishing illegally in Russian waters.
Following a 'sighting' by local official, hunters reveal 'footprints' that do not belong to bear or any other known creature.
FSB say Konstantin Zhuravlyov, 35, is now back with his family in Tomsk after being held as a 'spy' by Syrian opposition.