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

The Commerce Department has launched a probe into whether Chinese artificial intelligence startup DeepSeek obtained restricted Nvidia chips through Singapore, reports say.

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

Two U.S. Congress members 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.