FBI: 3 Teen Girls From Denver Tried to Join ISIS Girls ages 15 and 16 were caught in Germany, returned home By John Johnson, Newser Staff Posted Oct 21, 2014 4:10 PM CDT 78 comments Comments File photo. (AP Photo/Wong Maye-E) (Newser) – Three teenage girls from Denver flew overseas in a bid to join ISIS in Syria before being stopped, reports the Denver Post. The girls, ages 15 and 16, apparently were lured by a "slick" online campaign to join militants with the Islamic State, an FBI official tells ABC News. They made it as far as Frankfurt, Germany, before being detained, and all three have been returned to their families in Denver. It's unclear whether they will face charges. The Voice of America first reported the incident, saying that two of the girls are of Somali origin, while the third is Sudanese. Family members reportedly caught wind of the girls' plans after they left and informed authorities in Denver. The news comes after the arrest in July of 19-year-old Shannon Maureen Conley, also of Denver, who pleaded guilty to providing material support to al-Qaeda and the group's affiliates. Conley was arrested while trying to board a plane to Syria. The FBI official who spoke to ABC says he knows of other unpublicized cases of high school kids trying to travel to Syria to join ISIS.