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Ellie Taylor & Anna Whitehouse 10pm - 1am
20 May 2012, 12:13 | Updated: 21 May 2012, 11:20
Police were called to Coles Green Road in Dollis Hill at 11:30pm.
Another man, in his 50s, was taken to hospital where he remains in a serious but stable condition.
A 31 year old man also arrested on Saturday night has been bailed until a later date.