Local sources confirmed on Thursday that the ISIL terrorists attacked Tahrir al-Sham positions in Yarmouk in Southern Damascus, winning control over Haifa street.
They added that during the clashes which took several hours, a number of militants from both sides were killed and wounded.
In recent weeks, the ISIL has several times attacked the positions of three rival terrorist groups in the Southern countryside of Damascus city, imposing major losses on other militant groups.
Sources said late in January that the ISIL militants launched another wave of attacks on rival groups in the Southern suburbs of Damascus city, targeting the positions of Jeish al-Islam, Al-Nusra Front (Tahrir al-Sham Hay'at or the Levant Liberation Board) and the Free Syrian Army (FSA) throughout the district of Tadamun.
The sources added that ISIL managed to capture new points within the district and kill five rebel fighters of the Free Syrian Army.