NATO's chief is condemning the chemical attack in northern Syria and calling for those responsible to be held to account, ABC News reported .

Jens Stoltenberg said in a statement Wednesday that "this is the third report of the use of these barbaric weapons in the last month alone."

He recalled that the use of chemical weapons is prohibited and that "this international norm must be fully respected and upheld."

He said Syria "is responsible to ensure its full compliance with these obligations."

Source: MENA