The Pentagon's spokesman says the Obama administration is considering ways to fix the problems in supporting moderate Syrian rebels in the fight against the Islamic State in Syria.

Pentagon press secretary Peter Cook tells reporters that Defense Secretary Ash Carter still believes training and equipping moderate Syrian rebels and sending them into battle against the Islamic State is the right strategy.

But Cook also acknowledged failures when the first group of 54 U.S.-trained Syrian fighters were sent into Syria in late July and were attacked by a Syrian affiliate of al-Qaida.

Cook offered no details Tuesday on how the program might be revamped, nor would he say how many moderate rebels are now being trained in Turkey or elsewhere.