It is believed that al-Qaeda leader Ayman al-Zawahiri condemned Assad . A group thought linked to al-Qaeda and calling itself the al-Nusra Front claimed for a suicide bomb attack on 6 January 2012 in the central Damascus neighbourhood of al-Midan killed 26 people , most of whom were civilians , as well as for truck bombs that killed 55 people and injured 370 . A member of the Abdullah Azzam Brigades in Lebanon admitted that his group had sent fighters to Syria . On November 12 , 2018 , the United States closed its financial system to an Iraqi named , Shibl Muhsin ' Ubayd Al-Zaydi and others over concerns that they were sending Iraqi fighters to Syria and financial support to other Hezbollah activities in the region
a suicide bomb attack
January 2012 al-Midan bombing
Mujahideen