The Institute for Strategic Dialogue says Zaynab Sharrouf -- a 14-year-old Australian girl who was taken to Syria in 2013 by her father, a convicted terrorist -- posted this photo online. Supplied to CNN by the ISD. Supplied by Institute for Strategic Dialogue
ISD says Zaynab Sharrouf also posted this photo on Twitter with the caption: "Chillin in the khilafah, lovin life". Supplied to CNN by ISD. Supplied by Institute for Strategic Dialogue
Teenagers Amira Abase, Shamima Begum and Kadiza Sultana, were caught on CCTV at London's Gatwick Airport as they traveled to Turkey on their way to Syria. London Metropolitan Police
The family of Aqsa Mahmood, from Glasgow, believe she may have helped lure the Bethnal Green teenagers to Syria earlier this year; she moved there in 2013. Courtesy Mahmood family
An account purporting to be from Zahra Hallane -- one of the twin Manchester girls who fled to Syria last year -- posted a picture of her cat with the tweet: "@Zinnura_222 no my husband threw outside :( since then he never came back." Photo supplied to CNN by the ISD. Supplied by Institute for Strategic Dialogue
ISD says Zahra Hallane also posted this photo of masked women practicing "self-defence". Photo supplied to CNN by ISD.
ISD says Zahra Hallane also posted this photo online. Supplied to CNN by ISD. Supplied by Institute for Strategic Dialogue
Image taken from the Bird of Jannah blog, supplied to CNN by the Institute for Strategic Dialogue. Supplied by Institute for Strategic Dialogue