FedEx Corp.’s retreat from handling packages for Amazon.com Inc. signals that the lines are being drawn in the battle over surging e-commerce shipments.

FedEx Corp. is ending its ground-service delivery contract with Amazon.com, a sign the delivery giant is pulling away from the largest U.S. e-commerce company and focusing on other clients in the market, such as Walmart and Walgreens.

China rebuffed FedEx Corp.’s claims that it mistakenly rerouted some Huawei Technologies Co. packages to the U.S. and warned that authorities found other violations by the American delivery firm, raising concern the company could face repercussions from Beijing.

FedEx Corp. said its net income fell to negative territory in the fiscal fourth quarter, blunted by costs at its divisions as well as reorganization after a buyout.

FedEx Corp. has fired a new weapon in the simmering U.S.-China trade war, suing the Trump administration to block enforcement of trade restrictions that had placed the company in Beijing’s crosshairs.

FedEx Corp.’s pains are far from over. Expectations from its upcoming fiscal fourth-quarter results already have hit rock bottom, and now analysts say its entanglement in the prolonged U.S.-China trade war may dampen the outlook for the next year as well.

Amazon, the e-retail giant, has built up its logistics infrastructure over the years. This expansion includes a new warehouse just outside Omaha, Neb., as part of an effort to control more deliveries on its own rather than relying on FedEx Corp., UPS Inc. or the U.S. Postal Service.

FedEx Corp. said June 7 it wouldn’t renew its U.S. air-delivery contract with Amazon.com, paring a key customer relationship as the largest online retailer deepens its foray into freight transportation.

The petite states of Vermont and New Hampshire successfully hosted 56 drivers at the combined State Truck Driving Championships in Pembroke, N.H., June 1. Vermont had 18 competitors and New Hampshire had 38.