ST James's Street in Walthamstow was closed by police both directions around Station Road following an assault.
A 42-year man suffered cuts to his head and hands during the attack outside St James Street station at around 4.20am and is being treated in hospital.
No weapons were used in the assault.
Roads in the area were closed while officers established a crime scene, causing widespread disruption during rush hour.
Roads have now been re-opened.
More to follow
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