China has granted temporary export licenses to rare-earth suppliers of the top three U.S. automakers, two sources familiar with the matter said, as supply chain disruptions begin to surface from Beijing's export curbs on those materials. At least some of the licenses are valid for six months, the two sources said, declining to be named because the information is not public. It was not immediately clear what quantity or items are covered by the approval or whether the move signals China is preparing to ease the rare-earths licensing process, which industry groups say is cumbersome and has created a supply bottleneck. China's decision in April to restrict exports of a wide range of rare earths and related magnets has tripped up the supply chains central to automakers, aerospace manufacturers, semiconductor companies and military contractors around the world.