More than 160 volunteers are continuing the search for three Cree cousins who have been missing since May 20.

Curtis Brass, 16, Elijah Brass, 15, and Rodney Brass, 16, are members of the Sapotaweyak (Shoal River) Cree Nation. They failed to return from a canoe trip on Lake Winnipegosis in Manitoba.

Search teams have looked for the boys, who are nephews of Chief Al Brass, for 11 days as of Tuesday. An RCMP sergeant said it is growing more unlikely that they will be found alive.

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Hope fading in search for missing teens (CBC 5/31)

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Search continues for three missing Cree teens (5/26)