It's still not known what caused the Sindbad submarine to sink. One report, from the Association of Tour Operators of Russia, suggested the vessel may have hit a reef at a depth of around 20 metres. A woman now tells Russian outlet Ren TV, in a phone interview, that water flowed into hatches as passengers boarded the submarine. Ekaterina says as they took their reserved seats, water started "pouring in" as two hatches were open. She says it was as if the submarine had fallen off "whatever it was holding on to". Earlier, we learned that tourists are taken out...