British police are investigating reports 12 members of the same family have travelled to Syria.
Three sisters and their nine children, aged 3 to 15, are feared to have crossed into Syria from Turkey, after a pilgrimage to Saudi Arabia.
They were due home to Bradford in West Yorkshire last week.
It follows the news that a 17 year-old also from West Yorkshire was thought to have become Britain's youngest suicide bomber, with an attack on an oil refinery in Iraq.
Dr Adbul Bary Malik, a community activist based in Bradford, says the area is in shock about the news of the family thought to be in Syria.
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Dr Adbul Bary Malik, a community activist based in Bradford, says the county has been working to tackle radicalisation issues, but needs to do more.
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Dr Adbul Bary Malik, a community activist based in Bradford, says young people in the county need to play a role in tackling radicalisation of their peers.
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OUT: ...Islam."
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