Western-backed rebels in northern Syria are fighting to survive in the face of advances on their strongholds both by jihadists and government forces, analysts and regime opponents say.

The opposition has sounded the alarm, appealing indirectly to the international community to carry out air strikes on jihadist Islamic State (IS) positions in Syria, like the United States has done in Iraq.

“More than ever the rebellion is caught in a pincer movement between the regime and IS,” says Karim Bitar, Senior Research Fellow at the Institute for International and Strategic Relations. […]