The boy was initially believed to have suffered from a knife attack on Charter Avenue, Ilford, near Seven Kings School on Wednesday evening. Police were called at 6.26pm to the incident in east London. Officers were joined at the scene by the London Ambulance Service.
The boy has been taken to hospital.
The teen’s condition is not thought to be life-threatening.
No arrests have been made although police continue their enquiries and police later confirmed he had not been stabbed.
A statement from the Metropolitan Police said: “Police were called at 6.26pm on Wednesday, October 20 to reports of a teenage boy found injured in Charter Avenue, Ilford.
“Officers attended along with London Ambulance Service.
“A 13-year-old boy was taken to hospital with stab injuries.
“His condition is not believed to be life-threatening.
“Enquiries into the circumstances are ongoing. At this early stage of the investigation, no arrests have been made.”
JUST IN: Gloating Remainers mock UK over festival’s ‘grow-your-own veg’ plans
Despite the number of incidents in the capital, Sadiq Khan has pledged to do more to tackle the issue.
London’s mayor held a knife crime summit during the summer to discuss ways to reduce the number of stabbings.
The mayor was joined at the summit by Met Commissioner Dame Cressida Dick, Crime and Policing Minister Kit Malthouse, and council leaders from across the city.
Mr Khan said: “As we go into the summer, London and national partners, including the Met Police, the Probation Service, local authorities, City Hall and communities, are working closely together on a comprehensive plan to tackle violence and ensure young Londoners have positive activities to get involved in during the holidays.
“We are putting aside any political differences as it’s vital all relevant authorities and leaders work together to make sure we’re doing everything we can to reduce violence and keep our city safe.”
Mr Malthouse also insisted young people must be able to live and grow up in a peaceful area in order to fulfill their potential.
He added: “We all have a responsibility to act and that is why the Government is taking action to tackle the drivers of crime, divert young people at risk of violence or exploitation, get weapons off our streets and deliver swift justice to criminals.
“To succeed it needs agencies working together at national and local level to help give our young people a safe summer.”
Boris Johnson has also claimed the Government will do more to tackle knife crime.
Ministers are also contemplating removing rules which make it harder for the police to use section 60 stop and search orders.