Chip designer Nvidia said that US officials told it to stop exporting two top computing chips for artificial intelligence work to China, a move that could cripple Chinese firms' ability to carry out advanced work like image recognition. The company on Wednesday said the ban, which affects its A100 and H100 chips designed to speed up machine learning tasks, could interfere with completion of developing the H100, the flagship chip Nvidia announced this year. Nvidia said US officials told it the new rule "will address the risk that the covered products may be used in, or diverted to, a'military end use' or'military end user' in China." Asked for comment, the US department of Commerce would not say what new criteria it has laid out for AI chips that can no longer be shipped to China but said it is reviewing its China-related policies and practices "keep advanced technologies out of the wrong hands. "While we are not in a position to outline specific policy changes at this time, we are taking a comprehensive approach to implement additional actions necessary related to technologies, end-uses, and end-users to protect US national security and foreign policy interests," a spokesperson told Reuters.