The death in an airstrike of a radicalised schoolgirl who fled Britain last year to join Islamic State in Syria should prompt a full review of Prevent, the government's counter-terrorism strategy, an MP has said.

Kadiza Sultana, who left her home in Bethnal Green, east London, during the half-term break in February 2015 with friends Shamima Begum and Amira Abase, is reported to have died in the terror group's stronghold of Raqqa in May this year.

Tasnime Akunjee, a solicitor for the family, told the Guardian they believed Sultana had been killed, probably several weeks ago.

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