Police also say they believe the attack was carried out by one man who died at the arena

Manchester attack: British police say 22, including children, killed in suicide explosion at Ariana Grande concert

Armed police officers stand near the Manchester Arena after the suicide bomb attack

British police name Manchester attacker as Salman Abedi

'broken. from the bottom of my heart, i am so so sorry. i don't have words'

Ariana Grande says she is 'broken' in tweet after Manchester attack

The group said in a statement published on its social media channel that 'one of the caliphate's soldiers placed bombs among the crowds'

Islamic State claims responsibility for Manchester attack

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manchester attack

Manchester attack: British police say 22, including children, killed in suicide explosion at Ariana Grande concert

British police name Manchester attacker as Salman Abedi

Ariana Grande says she is 'broken' in tweet after Manchester attack

Islamic State claims responsibility for Manchester attack