
Defense Secretary James Mattis said on Wednesday that the White House's warning to Syrian forces against using chemical weapons prevented a second chemical strike. (Getty Images)

According to Reuters, Secretary of Defense James Mattis said on Wednesday that a warning from the White House to Syrian President Bashar al-Assad averted a chemical attack like the one that occurred in April against the Syrian rebel-held town in the Idlib province.
The warning issued on Monday said that Assad and his military "will pay a heavy price" should Assad's forces carry out a chemical attack.
Reuters reported, however, that the intelligence that prompted the warning from the White House was "far from conclusive," according to an unnamed U.S. official familiar with the intelligence report.
"It did not come close to saying that a chemical weapons attack was coming," the official said.
According to Reuters, the intelligence consisted of a Syrian warplane being seen moving into a Shayrat airbase hanger thought to contain chemical weapons.
"I think that Assad's chemical program goes far beyond one airfield," Mattis said.
Russia also responded on Wednesday. Russian Foreign Minister Sergey Lavrov told a news conference in the city of Krasnodar that if the U.S. should act with force against Syria then Moscow will respond.
"We will react with dignity, in proportion to the real situation that may take place," Lavrov said.