United States has warned China that it will prevent Beijing from taking over territory in international waters in the South China Sea. In a press briefing, White House spokesman Sean Spicer said, Washington will defend American and international interests in the South China Sea and that trade must be a two-way street. <br/><br/>He said, if those islands are, in fact, in international waters and not part of China, US will make sure to protect international interests from being taken over by one country. China lays claim to a vast extent of the South China Sea within a so-called nine dash line, including waters claimed by several of its neighbors.