At least 50 fighters and two civilians were killed Tuesday in clashes between rival anti-regime groups east of Syria’s capital, the UK-based opposing Syrian Observatory said.

At least 50 fighters and two civilians were killed Tuesday in clashes between rival anti-regime groups east of Syria's capital, the UK-based opposing Syrian Observatory said.

Jaish al-Islam (Army of Islam) group has been involved in nearly three weeks of clashes with rival factions led by Al-Qaeda's local affiliate in the opposition stronghold of Eastern Gouta.