Police have closed Stoke Newington Church Street and surrounding roads after a stabbing this afternoon.
Emergency services were called to the scene, near Abney Park Cemetery, at about 1.40pm.
The air ambulance also attended and the victim was taken to hospital. A Scotland Yard spokesman said his injuries were not yet known.
One witness tweeted that it was a fight and said police were “very quick” and arrived within five minutes.
“I came out of a shop,” he said, “and there were three men flighting in the road blocking traffic, [and] people shouting.
“They were wrestling on the floor in the middle of the road. Looked like one got stabbed and the other two ran off. Victim was lying in the road and onlookers helped him off the road.”
Church Street and surrounding roads have been closed while officers investigate.
One person has been arrested on suspicion of causing grievous bodily harm.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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