The six were found guilty of “murdering four people with the aim of carrying out an initiation ritual into a sect and of desecrating the bodies of the dead,” a court in the city of Yaroslavl, north-east of Moscow, said in a statement.
The group, four of whom were minors at the time, killed the four teenagers in June 2008, prosecutors said. They then desecrated the bodies and stole their possessions.
The longest sentence of 20 years went to the man named as the group’s leader, Nikolai Ogolobnyak.
The members of the gang called themselves Satanists and earlier carried out animal sacrifices, Komsomolskaya Pravda, the Russian daily, reported, citing investigators.
They stabbed the victims and then dismembered their bodies and cooked and ate some body parts, Komsomolskaya Pravda reported.