The Federal Bureau of Investigations is tracking close to 150 Americans it believes traveled to Syria in recent months, potentially to join armed groups, FBI Director James Comey said on Tuesday.
He said Americans fighting with foreign jihadist groups are a top concern for the FBI because of the possibility they could return to the United States with the training, expertise and connections required to launch an attack on home soil.
“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.