BHP's Bid for Rio Tinto Probed

European Union To Examine Offer For Mining Rival

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The European Commission Friday launched an investigation into Anglo-Australian miner BHP Billiton's unsolicited $170 billion bid for rival Rio Tinto PLC, just as BHP closed out one of the most difficult years of negotiations between steelmakers and iron-ore providers.

BHP said Friday it had reached an agreement with China's Baosteel on an iron-ore price rise, with the increase in line with price increases already announced by Rio. The deal closes ...