According to a report by The New York Times, official warnings were issued by Rubio regarding the Nvidia chief's entanglement with a Chinese spy. The source material provides limited details surrounding the specific nature of the entanglement, the identities of the individuals involved other than the Nvidia chief and Rubio, or the exact timeline of the warnings. However, the report highlights concerns regarding national security and potential intelligence risks involving prominent technology leadership. Further details regarding the investigation or official responses were not included in the available text.