https://www.reuters.com/article/us-china-fedex-huawei/u-s-china-tensions-weigh-on-huaweis-ties-with-partners-fedex-flex-idUSKCN1UL02H >U.S. FedEx Corp on Friday again apologized and blamed Washington's ban on Huawei for being "unclear" as Beijing deepened an investigation into why the delivery firm was holding up packages meant for the telecoms equipment maker.