The news report that in
Kazan, Russia, an Islamist sect was found living underground for more than 10 years. The members were forbidden to leavean 8-storey (!) bunker they dug (probably themselves) under the basement of a building. Some children never saw daylight.
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Оригинал:
https://tigr.net/2012/08/10/an-undeground-sect-literally/