The Arab League said Wednesday it will strive to ensure that all of those behind mounting violence in the war-ravaged Syrian city of Aleppo face "international justice," AFP reports.

The pan-Arab organization met in Cairo as fighting that raged in the divided city threatened a complete breakdown of a truce between President Bashar al-Assad's regime and non-jihadist rebels.

The Arab League said it had decided to "work on bringing all those who participated in and contributed to the brutal attacks against innocent civilians in Aleppo and other Syrian cities to international justice."

The 22-member bloc denounced the "the Syrian regime's brutal actions against unarmed civilian residents" in Aleppo, calling the attacks "a massacre," in a resolution announced after the meeting.

It also denounced ISIS and "all terrorist groups" which are committing crimes against civilians in Aleppo and other Syrian cities.