US officials are probing whether Chinese AI startup DeepSeek bought advanced Nvidia Corp. semiconductors through third parties in Singapore, circumventing US restrictions on sales of chips used for artificial intelligence tasks,

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

Organised AI chip smuggling to China has been tracked out of countries including Malaysia, Singapore and the United Arab Emirates, the source said. The Commerce Department and DeepSeek did not immediately return requests for comment.