RSS, a citizen journalism blog exposing the atrocities of the IS in their de facto capital of Raqqa, confirmed the report on Twitter: `One of our member called " Ibrahim " and another friend called "Fares" was found slaughtered in their house in Urfa `
The group has published first-hand accounts, videos and pictures of the Syrian city under IS. and was awarded the International Press Freedom Award 2015 from the Committee to Protect Journalists (CPJ).
Seven Syrians were taken in police custody for the murder, according to Radikal newspaper.
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