Three men were hurt in a fight on New Year's Day.
Police believe the fight broke out near a private party at a flat in Wood Street, Walthamstow, at around 6am on Tuesday.
The men, in their 30s, were taken to hospital for treatment for non-life threatening injuries.
Police say there is nothing to suggest the incident is gang-related.
Enquires continue and so far no arrests have been made.
Any witnesses or anyone with information is asked to contact CID officers at the North East Command Unit on 07747 780610 or tweet @MetCC quoting ref: CAD 4367/1Jan or call Crimestoppers anonymously on 0800 555 111.
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