By David Shepardson
WASHINGTON (Reuters) - The Federal Communications Commission said on Thursday an investigation had found that a Brooklyn bitcoin mining operation interfered with T-Mobile US Inc's <TMUS.O> broadband network.
The company had complained about interference to its 700 MHz LTE network in Brooklyn from radio emissions it said were coming from a Brooklyn residence mining for the cryptocurrency - verifying bitcoin transactions.
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The FCC said its investigation determined the user was "generating spurious emissions on frequencies assigned to T-Mobile’s broadband network and causing harmful interference."
The agency's enforcement bureau said in a letter dated Thursday that continued use of an operation known as "Antminer s5 Bitcoin Miner" would constitute a violation of federal law and could result in fines, criminal prosecution or seizure of the equipment.
T Mobile did not immediately respond to a request for comment.
FCC Commissioner Jessica Rosenworcel said in a tweet the "letter has it all: #bitcoin mining, computing power needed for #blockchain computation and #wireless #broadband interference. It all seems so very 2018."
(Reporting by David Shepardson; Editing by Susan Thomas)