Syrian fixed-wing aircraft dropped chemical weapons on civilians in Idlib earlier this week in a deadly attack which activists said killed at least 100 people — including 25 children — and injured at least 400 others, two U.S. military officials told NBC News.
The U.S. military saw the aircraft on a radar and watched them drop the bombs, the officials said. The radar soon picked up the flashes and booms in the rebel-held area of Syria.
Soon after, civilians on the ground began responding in a way that is consistent with exposure to a nerve agent documented in horrific images of people writhing in pain, coughing and young children gasping for air.
One official said they believe there was a combination of two agents and while they do not believe one was chlorine, he would not say what they were.
Secretary of State Rex Tillerson was expected to discuss the situation in Syria on Thursday.
This is a developing story