FILE PHOTO: The U.S. Federal Trade Commission seal is seen at a news conference at FTC headquarters in Washington, U.S., July 24, 2019. REUTERS/Yuri Gripas/File Photo/File Photo

(Reuters) -The U.S. Federal Trade Commission said on Tuesday it sued real estate and rental listing websites Zillow and Redfin over what the regulatory agency called an illegal agreement to suppress rental advertising competition.

(Reporting by Christian Martinez)