Editor's note: This story contains graphic images of children burned in the Turkish-led offensive.
The United Nations is investigating the possible use of chemical weapons in the conflict in northeastern Syria, according to The Guardian's Dan Sabbagh. The Kurdish Red Crescent has raised concerns about Turkish forces and Turkish-supported opposition forces using chemical weapons.
The Organization for the Prohibition of Chemical Weapons (OPCW) told The Guardian that it was "aware of the situation and is collecting information with regard to possible use of chemical weapons," but cautioned that it has "not yet determined the credibility of these allegations."
President Donald Trump's national security adviser issued a crystal clear warning to Syria on Monday, stressing that if the Syrian regime uses chemical weapons again, it will face a "much stronger" response than before.
The United States, Britain, and France conducted "precision strikes" on Syria on Friday in response to a suspected chemical weapons attack that reportedly killed dozens in the rebel-held town of Douma.
A coalition of ships and bombers hammered three Syrian chemical weapons sites with 105 weapons on Friday night in an escalated response designed to smash the Assad regime's capacity to use chemical weapons like chlorine and sarin gas.