The U.S.-led coalition against Islamic State has supplied its Syrian allies with armored vehicles for the first time, expanding support since U.S. President Donald Trump came to office, a spokesman for the Syrian groups told Reuters on Tuesday.

The armored vehicles and troop carriers had arrived four or five days ago, said Talal Silo, spokesman for the Syrian Democratic Forces (SDF) alliance, which includes the Kurdish YPG militia.

Though the number was small, he said, "this is evidence that there are signs of new support". "Previously we didn't get support in this form, we would get light weapons and ammunition," he said.

"There are signs of full support from the new American leadership - more than before - for our forces," he said.