Syrian government

On President Donald Trump's orders, US warships launched between 50-60 Tomahawk cruise missiles at a Syrian government airbase where the warplanes that carried out the chemical attacks were based, US officials said.

"Assad choked out the helpless," the President said.

"There can be no dispute that Syria used banned chemical weapons ... and ignored the urging of the UN Security Council," he said during short remarks to reporters at Mar-a-Lago. "The refugee crisis continues to deepen and the region continues to destabilize."

A group of buses scheduled to evacuate the last civilians and rebels from eastern Aleppo has been delayed, Syrian state-run media said, blaming infighting among rebel factions.

Turkish Foreign Minister Mevlut Cavusoglu tweeted Tuesday that 37,500 people had been evacuated from the war-torn city so far, adding that "all evacuations are intended to be finished by tomorrow."

Both the Syrian regime and a key rebel group had said earlier they expected the evacuations to be completed Tuesday.