The U.N. Security Council will hold a meeting on Friday on the situation in Syria's Idlib province, where an expected government offensive could cause a humanitarian disaster, U.S. Ambassador to the United Nations Nikki Haley said on Tuesday.

In a news conference, Haley also said U.S. President Donald Trump plans to host a high-level meeting of the Security Council about Iran during September, when the United States holds the rotating presidency of the 15-nation body.