British police are trying to trace the movements of three teenagers who are believed to be travelling to join Islamic State fighters in Syria.

Three girls, two aged 15 and one 16, flew to Turkey on Tuesday without their parents鈥 knowledge. The three are thought to be friends with a fourth girl who travelled to Syria in December.

鈥淲hat we do know is they鈥檙e all British girls,鈥 Nico Hines, the London editor of the Daily Beast, told 麻豆影视 Channel. 鈥淎ll three of them are said to speak with a strong London accent. These are proper British girls.鈥

Two of the girls, Shamima Begum and Kadiza Sultana, are pupils at the Bethnal Green Academy in London.

鈥淓ven more bizarrely, they鈥檙e said to be really smart. They鈥檝e done really well at school,鈥 Hines said. 鈥淎nd it鈥檚 just one of these great mysteries 鈥 why are these people convinced to go?鈥

Hines said, upon arrival, women who join the Islamic State are thought to become part of a team of recruiters who try to lure other young recruits online.

Police and the teens鈥 families are attempting to reach the girls through social media, urging the girls to return home.