Trump says FBI investigating Nvidia boss's affair with alleged Chinese spy

Donald Trump has said the FBI is investigating the affair between the boss of Nvidia and an alleged Chinese spy.

The US President said he spoke with chief executive Jensen Huang on Monday following reports that the US believed he had been targeted in a Chinese espionage campaign.

"I asked him that question, 'Did you have any idea she was a spy?' He said 'I had no idea she was a spy' and I really believe him," Trump told reporters.

China has rejected claims that Huang was targeted, with its foreign ministry saying the allegations were "entirely groundless, speculative and intended to smear and malign China".

Nvidia, who has commissioned an independent investigation into the affair involving Alice Huang, alleged to be a Chinese spy, said it had no reason to believe the company's secrets or national security were compromised.

But later on Monday, Trump said the FBI was now looking into the issue, but did not elaborate on the probe or when it was launched.

US intelligence officials believe Alice Huang, also known as Huang Le, was a spy for Beijing, according to a New York Times report.