(BBC NEWS) -- A woman has become the sixth person arrested in the UK over the Manchester Arena bombing, as police said they were investigating a "network."
Police said they had arrested the woman after an armed raid at a block of flats in Blackley, north Manchester.
Suicide bomber Salman Abedi killed 22 - including children - and injured 64 at an Ariana Grande concert on Monday.
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The bomber's father, Ramadan, and younger brother, Hashem, have been detained by militia in Libya. And his older brother, Ismail, was detained in Chorlton, south Manchester, on Tuesday.