The FBI is monitoring nearly 150 Americans who traveled to Syria recently and may have joined armed groups, Reuters reports.
FBI Director James Comey said he’s worried that Americans may return to the U.S. with training and connections to launch a terrorist attack on the homeland.
“We have tracked coming up on close to 150 people who traveled from the United States to Syria, for all manner of motivations. A significant number of them to fight,” he told reporters at a briefing in Boston.
“We are determined not to allow future lines to be drawn from a terrorist diaspora out of Syria to a future 9/11,” he said.
The FBI’s biggest concern is Americans who are joining Islamic State because of effective recruitment campaigns on the internet.
“There we see somewhere in excess of a dozen (Americans who have joined Islamic State) that we have a pretty good handle on,” Comey said. “I don’t have high confidence that I see the entire universe,” he added.