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Investors sue in U.S. over Brazil dam disaster

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(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 November’s fatal dam burst at a Brazilian mine it co-owned and operated.

In a complaint filed on Wednesday in the U.S. District Court in Manhattan, investors led by the Jackson County Employees’ Retirement System in Michigan said BHP inflated the price of its American depositary receipts by ignoring safety risks and overstating its commitment to safety before the disaster.

Four BHP officials were also sued, including CEO Andrew Mackenzie and Chairman Jac Nasser.

Wednesday’s lawsuit follows the Nov. 5, 2015, dam burst in Minas Gerais, Brazil’s main mining state, at the mine run by Samarco, a joint venture between BHP and Brazil’s Vale S.A .

The burst unleashed huge quantities of mud and waste that destroyed a nearby village and killed at least 17 people, in Brazil’s worst environmental disaster.

On Nov. 30, Brazil sued BHP and Vale for 20 billion reals ($4.97 billion) of damages.

The price of BHP’s ADRs closed that day 20% below where they traded before the dam burst, and the complaint said BHP should compensate ADR investors for that decline.

“Defendants knew or recklessly disregarded the precarious condition of the Fundão dam and Samarco’s tailings facilities,” causing harm to investors when the truth came out, it said.

BHP said in a statement emailed to Reuters that it would not comment on potential or ongoing litigation.

The lawsuit seeks class action status for ADR investors between Sept. 25, 2014, when BHP touted its focus on safety in a U.S. regulatory filing, and Nov. 30, 2015, when Brazil sued.

On Tuesday, Brazilian police accused six Samarco officials and one contractor of murder in connection with the dam burst. Samarco called such accusations “misguided.”

The law firm Robbins Geller Rudman & Dowd, which specializes in securities fraud lawsuits, filed Wednesday’s complaint. Vale was not named as a defendant.

The case is Jackson County Employees’ Retirement System v. BHP Billiton Ltd et al, U.S. District Court, Southern District of New York.