Former UN envoy Lakhdar Brahimi acknowledged that Syria terrorist groups were responsible for the chemical attack in Khan al-Assal in Aleppo.

Former UN envoy Lakhdar Brahimi acknowledged that Syria terrorist groups were responsible for the chemical attack in Khan al-Assal in Aleppo.

"From the little I know, it does seem that in Khan al-Assal, in the north, the first time chemical weapons were used, there is a likelihood it was used by the opposition."

In an interview with the German newspaper Der Speigel, Brahimi said that many countries misjudged the Syrian crisis, expecting Assad's rule to crumble.

 As a result, they supported the terrorist groups, as what some Arab leaders had done, he added.

Brahimi warned that Syria is descending into a Somalia-style failed state run by warlords.

"The conflict is not going to stay inside Syria," he cautioned.

The terrorist groups had launched a chemical rocket onto the town of Khan Al-Assal in Aleppo in March 2013.