Dec. 16 (UPI) -- The Trump administration has halted negotiations with Britain on a technology deal over frustration with the pace of lowering trade barriers, unnamed sources familiar with the process told multiple news outlets Tuesday.

The New York Times was the first to report on the stalled Tech Prosperity Deal, citing sources who agreed to speak on condition of anonymity. The BBC and CNBC also confirmed the news.

Britain and the United States agreed in September to the tech deal, which provides for collaboration on artificial intelligence, nuclear fusion and quantum computing. The deal would have seen U.S. tech companies, including Google Nvidia, OpenAI, CoreWeave and Microsoft, invest some $41.63 billion to help develop Britain's AI infrastructure.

President Donald Trump at the time said the Tech Prosperity Deal would "ensure our countries lead the next great technological revolution side by side." Language from the deal, though, said it only "becomes operative alongside substantive progress being made to formalize and implement" the May trade deal.

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