Amazon.com Inc (NASDAQ:AMZN) and iRobot Corp have been asked for more information by the US Federal Trade Commission (FTC) regarding the eCommerce giant's $1.7 billion buyout of the Roomba vacuum maker, Reuters reported In a filing on Tuesday, the newswire noted that iRobot said the FTC had on September 19 requested more details on the deal that was announced last month and will expand Amazon's stable of smart home devices. A group of about 20 pro-privacy and worker organizations have urged US antitrust enforcers to stop the deal, citing concerns about privacy and Amazon's already powerful position in the smart home devices market, Reuters said.