British official says bomber was somewhat known
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British Home Secretary Amber Rudd says Manchester suicide bomber Salman Abedi was known "up to a point" to the British intelligence services and police.
She said Wednesday the investigation is continuing and declined to provide further details about Abedi, whose improvised bomb killed 22 people at a pop concert in Manchester.
Rudd says Britain's increased official threat level will remain at "critical" as the investigation proceeds.
