Jaish al-Islam
...Liwa al-Islam (Brigade of Islam) was established by Zahran Alloush, the son of Saudi-based religious scholar Abdullah Mohammed Alloush, after Syrian authorities released him from prison in mid-2011 where he had been serving time for his Salafist activism. The group claimed responsibility for carrying out the July 2012 Damascus bombing that killed Defense Minister Dawoud Rajiha, Deputy Defense Minister Asef Shawkat, and Assistant Vice President Hassan Turkmani. It was a driving force behind actions in the Damascus region. It cooperated and conducted joint operations with al-Nusra. In Sptember 2013 Saudi Arabia engineered Liwa al-Islam's merger with fifty other more or less Salafist groups as a counterweight to al-Nusra, which the Learned Elders of Islam considered was growing too powereful..., the dominant rebel group in Eastern Ghouta suburbs, said Thursday that the main goal of the attack is to liberate female prisoners from Adra prison, 15 km (10 miles) northeast Damascus.
Islam Amy said in statement that its fighters have captured the buildings surrounding the prison after seizing control of strategic Tel Kurdi district that used to be the industrial and commercial area of damascus before the revolution erupted in March 2011.
Separately, Islam Army's front man, Islam Alloush, said Syrian air forces had thwarted Islam Army attack on ISIS in Hajer al-Aswad suburb west of Damascus.
He hinted to coordination between the radical group and the regime army in fight against rebels.