Defense Secretary Jim Mattis issued a stern warning on Friday to Syria, urging the regime to abstain from using chemical weapons.
The Trump administration is prepared to again take military action against Syrian government forces if necessary to deter the use of chemical weapons and is concerned they may be developing new methods to deliver such weapons, senior US officials said on Thursday.
President Donald Trump has not ruled out additional military action to deter attacks or punish Assad, administration officials said, although they did not suggest any action was imminent.
"Chemical weapons are being used in Ghouta and we have proof", SNC spokesman Yahya al-Aridi told Reuters.
"You all have seen how we reacted to that, so the Syrian government would be ill-advised to go back to violating the chemical convention", Mattis said.
The ministry said in a statement that the US remarks about the use of chemical weapons in the Eastern Ghouta region of the east of the capital Damascus are "false claims". "The OPCW (Organization for the Prohibition of Chemical Weapons and Resolution) Fact-Finding Mission has confirmed multiple incidents of chemical weapons use in Syria, including the use of the toxic industrial chemical chlorine as a weapon", reads the. Unconfirmed intel has recently reported to the Pentagon that Syrian forces have weaponized chlorine and sarin gas.
Mattis also said on Friday that the USA government was concerned about the Syrian government's use of sarin gas, but acknowledged that he did not have evidence to prove that it was using the nerve agent. "I don't have the evidence;" of the Syrian regime's use of sarin gas but that "groups on the ground, NGOs, fighters on the ground have said that sarin has been used".