Beijing's top trade official says China and the United States have agreed to work on extending a deadline for new tariffs on each other after two days of trade talks in Stockholm.

U.S. and Chinese officials agreed to seek an extension of their 90-day tariff truce on Tuesday, following two days of what both sides described as constructive talks in Stockholm aimed at defusing an escalating trade war between the world's two biggest economies that threatens global growth.

The United States and China have failed to reach an agreement to extend a pause on high mutual tariffs after talks in Sweden. At a press conference in Stockholm on Tuesday, US Trade Representative Jamieson Greer announced that he would return to Washington to hold talks with President Donald Trump over the tariff pause,