 European shares fell on Tuesday as investors worried about escalating U.S.-China tensions and a resurgence in regional coronavirus cases, knocking shares of growth-sensitive cyclical sectors lower. The pan-European STOXX 600 index fell 0.5 by 0713 GMT, with banks, energy firms, insurers and automakers falling between 0.8 and 0.9. Asian stocks made cautious gains after the Trump administration said it will tighten curbs on Chinas Huawei Technologies Co, to crack down on its access to commercially available chips, while ratcheting up tensions with Beijing. 