Israeli military officials have stated that Syrian troops have used chemical weapons multiple times against the rebels seeking to overthrow the government of President al-Bashir.

Brigadier General Itai Brun said that military intelligence believes that the chemical weapon used was the deadly nerve gas sarin.

“To the best of our professional understanding, the regime has made use of deadly chemical weapons against the rebels in a number of incidents in the past,” Gen. Brun said. “Which chemical weapons? Apparently sarin. The regime is also using chemical weapons that neutralize and are not fatal.”

He said the intelligence service had pictures of victims foaming at the mouth with constricted pupils that “provide evidence that deadly chemical weapons have been used.”

The U.S. has previously stated that they would not allow Syria to use chemical weapons. However, U.S. Secretary of State John Kerry claims that Israeli Prime Minister Benjamin Netanyahu hasn’t provided enough evidence to back their claims regarding chemical weapons.