Seifollah, commander of Ahrar al-Sham's convoy of tanks and armored vehicles, was killed in the army's counteroffensive in Northwestern and Western Aleppo on Monday.
The confession by Ahrar al-Sham comes after Seifollah's death surfaced various media outlets yesterday.
Other terrorist groups have made similar confessions on their social network pages.
In a relevant development on Tuesday, the Jeish al-Fatah terrorists acknowledged that they have lost a major portion of the cement factory in the Southern countryside of the city of Aleppo.
The Syrian army has recaptured vast areas in the Southern countryside of Aleppo City, Jeish al-Fatah terrorists confirmed.
Hundreds of Jeish al-Fatah terrorists launched heavy attacks against the Syrian army's positions on Sunday evening.
The terrorists started their military operations against the government forces by firing rockets and mortars on their positions and then they resorted to suicide attacks.
"The Syrian army took the initiative from Jeish al-Fatah after receiving reinforcement and help from the popular forces," the Arabic-language media quoted a Jeish al-Fatah terrorist named Mostafa Soleiman a saying.
In a relevant development on Monday, dissident sources disclosed that the Jeish al-Fatah commanders had ordered their coordinators not to reveal the real number of the casualties in the battles in the Southern part of Aleppo province in order to prevent the terrorists from losing their morale.
The order by Jeish al-Fatah commanders comes after thousands of young terrorists were killed in Aleppo battlefield, the Arabic-language media quoted sources close to Ahrar al-Sham terrorist group as saying.
Most of the Jeish al-Fatah terrorists killed in Aleppo were young militants who had undergone military training for only three weeks. Jeish al-Fatah has brainwashed the young people to join the terrorist group, Ahrar al-Sham said; FNA reported.
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