Iran has slammed the recent U.S. airstrikes against Syria, saying Washington is fighting on the same side as al-Qaeda and ISIS in Yemen and Syria.

“As the only recent victim of mass use of chemical weapons (by [former Iraqi dictator] Saddam [Hossein] in the '80s, Iran condemns use of all WMD (weapons of mass destruction) by anyone against anyone,” Iranian Foreign Minister Mohammad Javad Zarif said in a post on his Twitter account on Friday.

He further condemned Washington for its double-standards, saying the U.S. helped Saddam in its chemical weapons attack against Iran.

The U.S., Zarif said, has twice in the current millennium used "bogus" chemical weapons allegations to use military force, including in the 2003 invasion of Iraq and the current strikes against Syria.

The news came after the U.S. fired almost 60 cruise missiles at an airfield of the Syrian army, saying that the airfield was used to conduct a chemical attack at a rebel-held town in the province of Idlib on Tuesday.

The Syrian government has on numerous occasions insisted that it has never used chemical weapons in the conflict.

The attack has been supported by Saudi Arabia, Britain, Israel, Turkey and some other countries, whereas Iran and Russia expressed their strong condemnations for it.