Huawei is suing the US over a government ban on its products, raising the stakes in a protracted diplomatic incident between China, the US and Canada, where a Huawei senior executive is facing extradition.

In a statement on Thursday, the company said it had filed a lawsuit in the US district court in Plano, Texas, calling for the ban on US government agencies buying Huawei equipment or services to be overturned.

According to Huawei, the ban, a provision of the National Defence Authorisation Act signed by Donald Trump in August, also prevents government agencies using third-party contractors who use Huawei products. It alleges that by singling out Huawei for punishment without trial, the US has violated its own constitution.

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