Facebook CEO Mark Zuckerberg told the Antitrust Subcommittee of the US House of Representatives it is "world documented" the government in Beijing steals technology from United States-based companies.

Asked whether they have knowledge of China stealing American intellectual property, the remaining three Big Tech CEOs questioned admitted they have seen no evidence of that fact.

Apple CEO Tim Cook and Alphabet's Sundar Pichai said they are not familiar with the situation first-hand, while Jeff Bezos, the chief of Amazon.com, revealed he had only seen reports suggesting the matter may be true, admitting, however, he is "certainly" aware there are knock-off American products being sold in China.