A US appeals court's decision halts a judge's order that blocked the deployment while a challenge to Trump's action plays out.

A US appeals court has ruled that President Donald Trump can deploy National Guard troops Portland, Oregon, despite objections from local officials.

The court granted a request from the US Justice Department to halt a judge’s earlier order, which had blocked the deployment during a legal challenge.

But it is unclear when troops might actually deploy, as the court’s decision addresses only one of two orders previously issued by that judge.