Alibaba Group Holding Ltd is set to launch a U.S. e-commerce website through its subsidiaries Vendio and Auctiva, which are in turn part of the Alibaba.com business group, the company told Reuters on Tuesday. Alibaba has been ramping up its international expansion with various acquisitions, including leading a roughly $200 million investment round in U.S. retail site ShopRunner Inc, setting up an investment division in the United States and offering more of its e-commerce and online payment products overseas.