The opposition militants controlled the main headquarters of ISIL in Aleppo, northern Syria, after six-day clashes with the group.

The opposition militants controlled the main headquarters of ISIL in Aleppo, northern Syria, after six-day clashes with the group.

The opposing UK-based Syrian Observatory announced Wednesday that several opposing battalions controlled the Children's hospital which is ISIL main headquarters, without clarifying the destiny of hundreds of the group's militants who were still in the bloc.   

The observatory noted that dozens of the kidnapped in the ISIL headquarters were released, yet the information was not proved.

It is worth to mention that ISIL has been clashing with the opposition militant groups since Friday.