Syrian state news agency SANA said the army had carried out operations responding to "terrorist violations" of the truce in the southern part of the enclave, targeting insurgent fortifications.
The coalition said a convoy with allied Kurdish-led Syrian Democratic Forces (SDF) was involved in an attack, but there were no American casualties.
The layers of air defense that Syria has should be able to confront some of the threats thrown at the regime.
Idlib was a “de-escalation” zone over the last two years but it was also a zone of contention, especially along the governorate’s borders.
Last week, Assad said he regarded the United States as an occupying power in Syria.
Whodunit? Massive explosion in Syria’s Hama leads to many theories as Syrian regime blame shifts between Israel and US.
Israel, which has often struck Syrian army locations during its neighbor's seven-year civil war, has neither confirmed nor denied mounting the raid.
Haley acknowledged regional concerns and said, “We all know our work in Syria is not done.”
Waters claimed that listening to “propaganda” of the White Helmets about the chemical weapons attack would lead to bombing of Syria.
Russia, which is helping Assad fight rebel forces opposed to his rule, immediately condemned the strikes.