VIDEO: Aftermath of Syrian Army attack in Deir Ezzor.

Video footage released online shows aftermath scenes of Syrian Army offensive against ISIS -yesterday- during breaking the siege.

Heavy losses for ISIS were reported as the video emerges destroyed tanks, captured tunnels and several posts that located at the perimeter of 137 regiment northwestern Deir Ezzor.

Worth mentioning that the Syrian Army backed by Russian air support recently lift the ISIS-imposed siege on Deir Ezzor