Trump administration officials say Syria might be building new chemical weapons, according to several news outlets.
The officials who spoke to reporters would only talk anonymously. They also say it's "likely" Syria has kept a secret stockpile of chemical weapons, even after it agreed to destroy the stash in 2013.
The accusation comes a little more than a week after Secretary of State Rex Tillerson and U.S. Ambassador to the U.N. Nikki Haley publicly denounced a chlorine gas attack that happened in January, pinning it on Syrian President Bashar al-Assad.
Chemical attacks aren't uncommon in parts of Syria. Rebel forces have been fighting Assad in a gruesome civil war for years.