Turkey says UK authorities took three days inform it about three London schoolgirls travelling to Syria, possibly to join Islamic State.
Shamima Begum and Amira Abase, both 15, and Kadiza Sultana, 16, travelled to Istanbul a week ago.
The Turkish deputy prime minister says they could have been stopped on entry to the country if British police had alerted the Turkish counterparts.
It comes as British counter terrorism chief Sir Peter Fahy said the danger of young people being radicalised online was one of the greatest threats to security in Britain.
IN: "Where in the past…
OUT: …Boy Scout camp."
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