Denver Teens Latest to Be Lured by ISIS Propaganda

The FBI is investigating three American teenage girls suspected of trying to join the Islamic State.

The girls -- two sisters, aged 15 and 17, and their 16-year-old friend -- are so young that authorities won't disclose their identity, but only revealed that the teens are originally from Somalia and Sudan.

They're now back with their families after authorities intercepted them in Germany.
    
Meanwhile, the evidence gathered so far makes it clear the girls were headed to Syria to pledge allegiance to ISIS.

Propaganda videos by the jihadist army allegedly lured the girls away from their families and friends in Denver, sending them on a mission to join terrorists in Syria.

"We have houses; we have security," an operative says in one propaganda video.

ISIS is well known for using social media -- YouTube, Twitter, Instagram -- to recruit a new generation of operatives.

"Its public messaging and social media is as slick and as effective as any I've ever seen from a terrorist organization," Secretary of Homeland Security Jeh Johnson said.

This is just the latest case of ISIS recruiting Western girls.

Last month, a 19-year-old Muslim convert named Shannon Conley pleaded guilty after making plans to join ISIS in Syria. Conley planned to marry a member of ISIS she'd met online.

Officials say there have been other cases of high school-aged kids trying to get to Syria that haven't been made public -- all part of a new global trend to radicalize "disaffected youth."

In the case of the three American teenagers, the FBI is still investigating whether the girls had overseas contacts and if Islamists funded the trip.