City of London Police are now saying no-one was detained in connection with the suspect package in the Old Bailey, contrary to their earlier statement.
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Merve Buyuksarac, who was crowned Miss Turkey in 2006, was handed a 14-month suspended sentence for sharing a satirical poem on Instagram.
Muhiddin Mire cut the throat of a stranger at an east London tube station "in revenge for the fight against IS", a court heard.
The significant development came after a forensic re-examination of a palm print left on a getaway vehicle.