"50 militants were killed during infighting among the terrorist groups in Eastern Ghouta near Damascus in past few days" the SOHR announced in a statement.
Other media sources also said that two Syrian civilians were killed in clashes among Jeish al-Islam, Faylaq al-Rahman and Jeish al-Fastat terrorist groups in Eastern Ghouta.
The SOHR announced on Sunday that clashes among the terrorist groups in Eastern Ghouta in the past 20 (since April 28 ) days had brought the total number of militant casualties to over 300.
Most of the dead militants are members of Jeish al-Islam and al-Nusra Front and tens of them belong to Faylaq al-Rahman group.
According to the SOHR, tens of civilians, including children and a female doctor, were also among the casualties of the terrorist groups' infighting.
Military sources had announced earlier this month that infighting had intensified among the terrorist groups across the country, mainly in Aleppo, Damascus and Idlib provinces, claiming the lives of hundreds of the militants in a matter of weeks.
"The farms of Douma in the Eastern part of Damascus province have also been the scenes of heavy fighting among the terrorist rivals, which have claimed the lives of many militants," they added.
"Abu Nasr, the commander of Faylaq al-Sham in Hama, was killed by the rival groups and his body and the body of one of his comrades were found in farms near the village of Juzef in Idlib province," they went on to say.
"A vast wave of bomb attacks against the positions of Ahrar al-Sham in Idlib, caused the terrorist group to intensify security measures across the province to the border with Turkey," the sources said.
"Ahrar al-Sham also launched an operation across Idlib to capture opposing groups' members, including those from the ISIL (Islamic State, ISIS, IS and Daesh)," they added.
"Suicide attacks killed at least 15 members of Ahrar al-Sham, including four field commanders, in the town of Banish during the last week while almost 30 more were wounded," the sources went on to say.
Majed al-Sadeq and Abu Jaber were among the killed commanders in Banish.
Saud al-Asaf, the commander of Ansar al-Haq affiliated to Ahrar al-Sham and three of his comrades were killed in a bomb explosion in the small town of Maasaran near Maraat al-Nuaman," the sources said.
"The ISIL and its terrorist rivals also engaged in fierce clashes in the Northern part of Aleppo province near Marea, which left scores of the terrorists dead from both sides," They added.
"The ISIL positions in al-Sham desert near Qalamoun in the Northeastern part of Damascus province and near al Zabat mountain and Ba'ar al-Qasab were pounded by the terrorists' mortars," the sources said.
The military sources further added that the recent ceasefires in Aleppo and Lattakia can give the terrorist groups to decrease their differences and gather in a united front against the ISIL, which will give the western countries and meddlers the opportunity to lead this front and increase their role in the region, specially in the crisis-hit Syria.
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