Bitcoin exchange Mt. Gox has received a subpoena from federal prosecutors in New York, according to a person familiar with the matter, dealing another blow to the embattled marketplace for buyers and sellers of the virtual currency.

Mt. Gox, one of the largest bitcoin exchanges, shut down on Tuesday, underscoring the risks of bitcoin, the virtual currency that has seen a meteoric rise in the past year. The subpoena was sent this month and asked Mt. Gox to preserve certain documents among other things, the person said.

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