- Syrian opposition group denounces "massive acceleration" in military aggression from Russia
- U.N. special envoy says Syrian opposition groups want immediate reduction in violence
- The envoy will meet with Syrian government representatives Tuesday in Geneva
Geneva, Switzerland (CNN)Warring forces in Syria's gruesome civil war are meeting in Geneva in hopes of ending the bloodshed, as illustrated Sunday by a triple bombing near a suburb in Damascus that killed dozens of people. ISIS claimed responsibility for the blast.