One of the nine bombers has links to the UK, and now Sky News has learnt more about Abdul Lathief Jamil Mohamed.
Sky sources say he studied aeronautical engineering at Kingston University in southwest London and his last visit to Britain was in 2008.
But it's believed he was radicalised overseas.
Sky's foreign affairs editor Deborah Haynes has been looking into his past as well as his movements just before the attack.
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