Syrian police killed in violent clashes with Assad loyalists - Foreign powers seek to provoke mass riots in Syria -- source - Sectarian violence in Syria has been less intense than feared since Assad's ouster - Syria escalation: Deadly attacks continue, healthcare and access compromised - Syrian state media: 2 Israeli airstrikes hit Syrian capital and a suburb, killing 15 people - Violence spikes in Syria's opposition-held northwest, killing civilians and striking infrastructure - Escalating violence in Syria raises fear of 'large-scale war' - Violence in Syria is on the rise while aid is flagging as the civil war enters its 14th year