guardian: Manchester Arena bombing: Saffie Rose Roussos, eight, named as second victim of suicide attack – latest

• Man arrested as officers raid flat in south of city
• Theresa May condemns ‘callous terrorist attack’
• Police begin to name victims; 12 children among 59 wounded
• What we know so far
• Full report: Deadly attack at Manchester Arena
• Confusion and chaos: witnesses describe night of horror
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