According to Abdel Bari Atwan, the editor-in-chief of Rai al-Youm newspaper, a large cargo of US-made weapons and military equipment has been recently dispatched to the terrorists in Northern Syria through Turkey.

“Turkey has supplied the terrorist groups, especially Fatah al-Sham (the newly formed al-Qaeda-affiliated terrorist group previously known as al-Nusra Front) with a large amount of US and non-US made weapons,” according to Atwan.

He said this is one of the main factors helping the terrorist groups to make advances in Eastern Aleppo, and added that other key factors include surprise attacks by a large number of militants, suicide attacks, and bomb-loaded vehicles.

Reports said on Monday that nearly 2,000 members of Jeish al-Fatah terrorist group were killed and many more were injured during clashes with the Syrian Army forces and the popular forces in recent days.

In the meantime, according to resistance forces, more than 2,000 fresh popular forces arrived in Aleppo to join the Syrian Army to fight against Jeish al-Fatah terrorist group in the Southern parts of the city.

"The newly-arrived resistance fighters are specialists in street war and know very well different tactics of battling against the well-equipped terrorists," resistance sources said.

Syrian Army forces, with the help of Lebanese Hezbollah, Iraqi resistance movements including al-Nujaba, Iranian IRGC military advisors, National Defense Forces of Nubl and al-Zahra, were actively involved in joint operations in Aleppo.