Four members of a Muslim sect in the Russian region of Tatarstan have been charged with cruelty against children for allegedly keeping them underground.
Police discovered 27 children and 38 adults living in catacomb-like cells in an eight-level underground bunker.
The sect's elderly leader, Faizrakhman Sattarov, had reportedly wanted to build his own Islamic caliphate beneath the ground.
Prosecutors said some of the children had lived there for more than a decade.
The sect was uncovered last week in a suburb of the city of Kazan during an investigation into recent attacks on Muslim clerics in Tatarstan, a mainly Muslim region on the River Volga.
Mr Sattarov, who had declared himself a Muslim prophet, has been charged with the crime of "arbitrariness", a broad crime that covers "actions contrary to the order presented by a law".
No immediate reaction to the charges was reported.
'Divine light'
Nineteen under-age children were removed by the Russian authorities, some of them placed in care, others in hospital, Russian government-owned newspaper Rossiyskaya Gazeta reports.
Officials said the children, aged between one and 17 years, had never left the compound,
According to the Russian website Islam News, Mr Sattarov, 83, declared himself an Islamic prophet in the mid-1960s after interpreting sparks from a trolleybus cable as a divine light from God.
He and his followers began to shun the outside world in the early part of this century.
The sect, dubbed Faizrakhmanists after their founder, reportedly do not recognise Russian state laws or the authority of mainstream Muslim leaders in Tatarstan.
Only a few sect members were allowed to leave the community to work as traders at a local market, local media report.
The cramped cells descend on eight levels under a decrepit, three-storey brick house on a 700 sq m (7,530 sq ft) plot of land, the Associated Press reports.
The house was built illegally and will be demolished, local police were quoted as saying.
-BBC
