UPDATE 1-BHP Billiton investors sue in U.S. over Brazil dam disaster
UPDATE 1-BHP Billiton investors sue in U.S. over Brazil dam disaster
NEW YORK, Feb 25 (Reuters) - BHP Billiton Ltd was sued in the United States by investors who accused the Anglo-Australian mining company of fraudulently overstating its ability to manage safety risks prior to **vember's fatal dam burst at a Brazilian mine it co-owned and operated.