Then, last summer, Noble dropped a bomb shell.

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While the bomb shell on Tuesday were the rumors that billionaire investor George Soros was exiting his position in gold, fewer people seemed interested in the bullish case for precious metals, presented by hedge fund titan John Paulson.

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Donal O'Sullivan, general manager of Haggerston Castle, said investigations were continuing to determine exactly why type of shell the bomb was.

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Witnesses said the explosion occurred in the top of the building, indicating either that a shell had hit it or that a bomb had been planted in the roof.

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