French president Emmanuel Macron on Saturday held phone conversations with U.S. President Donald Trump and British Prime Minister Theresa May to discuss results of joint air strikes against Syria, the French presidency said.

The conversations took place hours after the three countries launched a military intervention which they said targeted Bashar al-Assad's chemical weapons arsenal.

"It is now for the United Nations Security Council, in unity, to take initiative again political, chemical and humanitarian questions in Syria," the French presidency said in a brief statement.