Tech giant Huawei plans to file an international lawsuit against the US government, after Washington banned all federal departments from purchasing their products.

Huawei claims America has violated its own constitution by singling out a group for punishment without trial, after it passed legislation banning the use of its technology, specifically in the rollout of the 5G network.

Vice President Mike Pence defends the warning issued to other countries including Australia, who has now taken similar action, despite Huawei repeatedly denying claims that its technology is capable of espionage.