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

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.

U.S. officials are investigating whether Chinese artificial intelligence startup DeepSeek skirted American export restrictions on advanced chip sales and bought advanced Nvidia (NVDA) semiconductors through third parties in Singapore,