Nvidia’s board said it is launching a probe into reports that Chief Executive Jensen Huang has been the target of a foreign espionage effort. The company’s shares fell as investors assessed the consequences of the investigations, according to the source article.

The Wall Street Journal earlier reported that U.S. officials concluded last year that Chinese citizen Alice Huang, then a top executive at Megaspeed International, shared information with the Chinese government while working with Nvidia to build data centers in Asia.