Export controls need to be tightened after revelations the Chinese company used Nvidia technology, the leaders of a congressional committee said.

U.S. President Donald Trump's administration is considering tightening restrictions on artificial intelligence leader Nvidia's sales of its H20 chips designed for the China market, three people familiar with the matter said.

Singapore has promised to work closely with the US authorities to probe allegations over China's AI firm DeepSeek, obtaining Nvidia chips through proxies.

Trump administration officials are exploring additional curbs on the sale of Nvidia Corp. chips to China, according to people familiar with the matter, who emphasized that conversations are in very early stages as the new team works through policy priorities.

WASHINGTON (Reuters) -Two members of U.S. Congress are calling on President Donald Trump's administration to consider restricting the export of artificial intelligence chips made by Nvidia, alleging Chinese AI firm DeepSeek has relied on them.

DeepSeek stunned the tech world with the release of its R1 "reasoning" model, matching or exceeding OpenAI's reasoning model for a fraction of the cost.