Underground sect found after nearly a decade in Russia's Kazan

* Some 70 people, 20 children found in unheated, unlit cells

* Prosecutors have opened a criminal case

MOSCOW, Aug 8 (Reuters) - Seventy members of an Islamist

sect who have been living in an underground bunker without heat

or sunlight for nearly a decade have been discovered living on

the outskirts of the city of Kazan in Russia, local media

reported.

The sect members included 20 children, the youngest of whom

had just turned 18 months. Many of them were born underground

and had never seen daylight until the prosecutors discovered

their dwelling on Aug. 1 and sent them for health checks.

A 17-year-old girl turned out to be pregnant.

Religion was suppressed in the Soviet Union which collapsed

in 1991, prompting various cults and sects to flourish in the

vacuum that opened up.

The group - known as the "Fayzarahmanist" sect - was named

after its 83-year-old organiser Fayzrahman Satarov, who declared

himself a prophet and his house an independent Islamic state,

according to a report by state TV channel Vesti.

Satarov was described as a former deputy to a Sunni Islamic

cleric in the 1970s. His followers were encouraged to read his

manuscripts and most were banned from leaving their eight-storey

underground bunker which had been dug in the basement of a

building, Vesti said.

Prosecutors have opened a criminal investigation into the

sect and have said it will be disbanded if it continues its

illegal activities, such as stopping its members from seeking

medical assistance or education.

No arrests have been made although police are likely to look

into suspicions that some of the children were being abused. A

court will decide whether the children will be allowed to stay

with their parents.

Kazan is located 800 km (497 miles) east of Moscow in

Tatarstan, a majority Muslim internal Russian republic.

(Reporting By Nastassia Astrasheuskaya; Editing by Andrew

Osborn)