"A number of fighters of Fatah al-Sham, who tried to flee the battlefield in Sheikh Saeed neighborhood, were targeted by their own commanders and comrades," the sources said.

"Fatah al-Sham's fire at its own members in Sheikh Saeed caused the other hopeless members not to follow their targeted counterparts," they added.

"The Takfiri group's commanders kill the fleeing members in cold blood," the sources said.

The sources further added that militant groups in the Eastern part of Damascus have called on their allies to send fresh forces to Aleppo in a bid to intensify the war with army troops in other regions and provinces across Syria to give them some room in Damascus.

On Sunday, the General Staff of the Syrian Armed Forces called on terrorists in the Eastern districts of Aleppo to leave the city via the specified corridors under the protection of the country's soldiers and their Russian allies.

The General Staff of Armed Forces, in a move to protect the civilian population, called on militants, trapped in the Eastern neighborhoods of Aleppo city, to leave the city.

"The Russian and Syrian Army soldiers will allow the militants to leave the city through the government-established corridors without any problem," the General Staff said, vowing to provide the militants with full assistance.

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