A Syrian boy receives treatment at a local hospital following a suspected chlorine gas attack in Idlib on April 27, 2015.
U.S. is 'certain' Syria used chlorine gas in attacks
02:21 - Source: CNN
Washington CNN  — 

Secretary of State John Kerry on Tuesday said he was “absolutely certain” that the Syrian government had attacked its own people with chlorine.

Asked by reporters about his confidence that Syrian President Bashar al-Assad had used chlorine gas to orchestrate a chemical attack, Kerry said he was “absolutely certain” it had occurred.

“We are certain that the preponderance of those attacks have been carried out by the regime, and we’re putting together a portfolio of that data that supports that even as we speak now,” Kerry said.