Chinese telecom equipment maker Huawei is reviewing its relationship with FedEx Corp after it claimed the U.S. package delivery company, without detailed explanation, diverted two parcels destined for Huawei addresses in Asia to the United States and attempted to reroute two others.

Huawei told Reuters on Friday that FedEx diverted two packages sent from Japan and addressed to Huawei in China to the United States, and attempted to divert two more packages sent from Vietnam to Huawei offices elsewhere in Asia, all without authorization, providing images of FedEx tracking records.

Reuters could not verify the authenticity of the records. Shown the images of the tracking records, FedEx declined to make any comment, saying company policy prevented it from disclosing customer information.