NEW YORK CITY - Syrian opposition leaders Tuesday openly took issue with the US government's failure to launch a missile attack on the Syrian regime and pressed for assurances of US support in talks with US Secretary of State John Kerry.
Syrian opposition chief Ahmad Jarba led a four-strong delegation to meet Kerry on the sidelines of the UN General Assembly where the civil war in Syria is one of the top issues on the agenda.
Rebel forces are now fighting on two fronts, a senior State Department official said, highlighting that as well as battling the Syrian regime, rebel military chief General Selim Idriss and his forces were locked in combat against Islamist groups.
"Right now there's a real firefight going on up along the border Turkey and Syria between Al-Qaeda extremists and forces loyal to Selim Idriss," he said.
"That is battle that is ongoing right now, and it's very confusing," he said, adding the rebels were bringing in reinforcements but it was "a hard slog."
"It's the hardest fighting we've ever seen between Selim Idriss's elements of the Free Syrian Army and the Islamic State of Iraq in the Levant," he added.
"The extremists are doing the government's work now."
President Barack Obama on Tuesday unveiled a further US$340 million (S$426 million) in humanitarian aid for the refugees caught up in the war, in which 110,000 people have now been killed.