“The intelligence community is concerned that they [ISIS] have the ability, the capability to manufacture fraudulent passports, which is a concern in any setting,” Comey said.

Former Department of Homeland Security intelligence official and ABC News consultant John Cohen said, “If ISIS has been able to acquire legitimate passports or machines that create legitimate passports, this would represent a major security risk in the United States.”

Fake Syrian passports have already been discovered in Europe, most notably two used by suicide bombers in the horrific terrorist attack on Paris last month. The two men are believed to have slipped into Europe with a flood of Syrian refugees fleeing the violence in their homeland.

According to the source that provided the passport information to homeland security officials, Syria is awash in fake documents.