Dec 22 (Reuters) - The U.S. Federal Trade Commission (FTC) is advancing an antitrust probe into Amazon.com Inc"s cloud computing business, Bloomberg News reported on Wednesday, citing people familiar with the matter. FTC officials have contacted companies in the past few months to gather information about competition issues related to Amazon Web Services (AWS), according to the report which cited unnamed people familiar with the matter. The probe was undertaken as part of an investigation begun during the Trump administration, which kicked off investigations into the four tech giants. read more Amazon did not immediately respond to Reuters" requests for comment. "The FTC doesn’t confirm the existence of or comment on investigations," said agency spokeswoman Betsy Lordan.