The Chinese Foreign Ministry on Monday rejected recent reports by some media outlets peddling "Chinese spy" allegations tied to the Nvidia CEO saga.

The claim is "unsubstantiated," said Foreign Ministry spokesperson Guo Jiakun at a regular press briefing when asked to comment. "It's nothing but smears against China."

The US chip giant said on Sunday that it had opened an internal probe into CEO Jensen Huang after he admitted to having an extramarital affair. According to media reports, US officials allege the woman involved in the affair was working for Chinese intelligence.