FEARS are growing for a group of ten tourists who vanished while hiking on a bear-infested island.

The hikers - nine women and a man - have now been missing for two nights on Iturup island in Russia 's Far East.

The group had set out on an 11-day trek to summit the 3,714ft Baransky volcano , which remains an "active" threat.

They were briefed by guide Valery Fedosov, 36, from St. Petersburg, but the tourists reportedly did not register their trip with authorities beforehand.

The Russian hikers “stopped communicating” on Saturday night, raising alarm bells.

Before embarking on the hike, the group were given clear instructions from Fedosov about the threat of brown bears on the island.

The guidance reads: “Our best friends during the hike are noise, mass participation, and all the

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