A 16-year-old boy was stabbed in Fernbank Avenue at around 11.15pm on December 6.
He was taken to hospital where his injuries were confirmed as non-life-threatening.
Concerns had been circulating locally that the incident may have involved dangerous or contaminated drugs.
However, police say there is no evidence at this stage to support that, and they have not established any drug-related links.
Police also assisted the London Ambulance Service with a separate medical incident nearby, which is not believed to be connected to the stabbing.
Officers are speaking to those involved as part of an ongoing investigation.
No arrests have been made, and an increased police presence can be expected in the area.
Anyone with information is asked to contact police on 101 quoting CAD 7709/06Dec, or Crimestoppers anonymously on 0800 555 111.
A spokesperson for the Metropolitan Police said: “Police were called at around 23:15hrs on Saturday, 6 December to reports of a stabbing in Fernbank Avenue, Hornchurch.
“Officers attended the incident alongside the London Ambulance Service where a 16-year-old boy was found with injuries consistent with a stab wound.
“He was taken to hospital where his injuries were confirmed to be non-life-threatening or life-changing.
“Officers also assisted the LAS in relation to a medical incident, which at this time is not believed to be linked to the stabbing.
“Concerns have been reported locally that the incidents may be linked to the use of dangerous or contaminated drugs.
“There is no evidence at this stage to suggest there was any drug involvement.
“Officers are speaking to other parties involved in the incident and at this stage have not established any further drug links associated to the incident.
“An investigation is ongoing and no arrests have been made.
“An increased police presence can be expected in the area.
“Anyone who has any information on this investigation asked to contact police on 101 quoting CAD 7709/06Dec or call Crimestoppers anonymously on 0800 555 111.”
