Israel's Ministry of Foreign Affairs responded Monday evening to the alleged chemical attack in eastern Ghouta, saying it strongly condemns the attack and accused the Syrian government of "crimes against humanity."

A statement read: "Israel strongly condems the chemical weapons strike carried out by Syria on April 7, one year after the mass murder carried out by the regime in Khan Shaykhun."

The suspected chemical weapons attack late on Saturday killed at least 60 people, with more than 1,000 injured in several sites in Douma, a city near the capital, Damascus, according to a Syrian aid organization.Two days later, the White House was still only able to say that the attack fit the pattern of Syrian President Bashar al-Assad's chemical weapon use.

"The Syrian regime continues to perpetrate crimes against humanity in using these outlawed weapons," said Israel's foreign ministry.

"The attack shows clearly that Syria continues to possess lethal weapons and even manufacture new ones. Syria is grossly violating its obligations and the decision of the international community," it added.

Both the Syrian government and its Russian backers deny responsibility for the attack.

After a UN Security Council meeting Monday, U.S. ambassador Nikki Haley said the U.S. "will respond" to the attack regardless of whether the United Nations Security Council acts or not.

Reuters contributed to this report.