Police closed roads around the Heathway following an assault that left a man with head injuries.
The man, believed to be in his 40s, was taken to an east London hospital following the incident in Downing Road, Dagenham, in the early hours of Saturday morning.
He was taken to hospital by ambulance as a priority but is not thought to have suffered life-threatening or life-changing injuries.
Local road closures put in place while emergency services dealt with the incident caused disruption to motorists and buses along Heathway and Church Elm Lane.
They remained closed for close to 12 hours, only reopening again at about 3.30pm.
No arrests have been made. Enquiries are ongoing.
Did you see what happened? Do you know the injured man? Contact Freddy via email at freddy.mayhew@archant.co.uk or call 0208 477 3816.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here