A video has emerged that appears to show a man helping three British schoolgirls on their way to Syria from Turkey. (Scroll down for videos)
The footage is believed to show Shamima Begum, 15, Kadiza Sultana, 16, and Amira Abase, 15, in Gaziantep on the Turkish border with the war-torn nation.
They are seen wearing the same distinctive khaki, hooded winter coats, that they were wearing in an earlier video of them at a bus station in Istanbul.
Their sports holdalls are unloaded from the boot of one car before being transferred to another vehicle.
In the video from local news channel A Haber TV, a man speaking in English – who was later detained by Turkish authorities – appears to make mention of Syrian passports.
Turkish officials said the man was working for the intelligence service of a country that is part of the anti-Islamic State coalition, but did not publicly name the country.
The Foreign and Commonwealth Office (FCO) confirmed that a foreign spy had been detained on suspicion of helping the schoolgirls travel to Syria to join IS as “jihadi brides”.
The nationality of the person arrested remains unclear, but the FCO and Met Police said they were working closely with the Turkish authorities.
Turkish foreign minister Mehmet Cavusoglu told reporters the detained suspect works for the intelligence agency of a country that is part of the US-led coalition against IS.
Shamima, Zadiza and Amira sparked an international manhunt when they flew from Gatwick to Istanbul on February 17.
The three girls paid more than £1,000 in cash to a travel agent for their flights to Turkey and police officers believe they stole jewellery from relatives to fund the trip
The BBC’s Caroline Hawley has been exploring what life might be like for the 3 British girls who are thought to have gone to join Islamic State in Syria.