America's Kurdish allies in Syria, currently fretting over when the Trump administration will pull out the 2,000 U.S. troops who guarantee their safety, said Wednesday that they had apprehended an American teenager fighting with ISIS. If confirmed, the teen would be at least the second U.S. national held by the Kurds in Syria, among hundreds of captured foreign fighters whose fate is a major concern for U.S. officials trying to implement President Trump's order to withdraw American forces from the country.

The Kurdish militia known as the YPG, which has been the U.S. military's most valuable ally in the fight against ISIS in Syria, said eight foreign fighters were caught on Sunday and Monday in eastern Syria, about 15 miles from the Iraqi border.

Read more: CBS News