Infighting between foreign-backed militants in Syria has left more than 640 people dead since late April, a report says.
The so-called Syrian Observatory for Human Rights documented in the report released on Friday that at least 130,000 people have also been forced out of their homes since then.
The UK-based group said Takfiri militants of the al-Qaeda-linked Islamic State of Iraq and the Levant (ISIL) were preventing food and medical supplies from reaching some neighborhoods of Deir al-Zour in eastern Syria.
The infighting has escalated over the past months amid gains by the Syrian army across the country.
http://www.presstv.ir/detail/2014/06/13/366825/militant-infighting-kills-640-in-syria/