France and Germany are "concerned" over a number of decisions by US President Donald Trump, particularly his move to restrict refugee arrivals, French Foreign Minister Jean-Marc Ayrault said Saturday.

"Welcoming refugees who are fleeing war is part of our duty," he said following a meeting with his new German counterpart, Sigmar Gabriel.

"We must... ensure that this happens in a fair, just way and with solidarity."

Trump on Friday signed a sweeping executive order to suspend refugee arrivals and impose tough controls on travelers from seven Muslim countries.

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