Police were called just after 12am today (October 15) to reports of a fight between several men on Essex Road.
Officers attended alongside the London Ambulance Service who treated a 17-year-old boy for stab wounds before taking him to hospital.
His condition is believed to be life-threatening.
Before police arrived on scene, a separate 17-year-old boy self-presented at hospital, also with stab wounds.
Officers believe he was assaulted on Essex Road.
His injuries are not believed to be life-changing or life-threatening.
No arrests have been made at this stage, and a crime scene remains in place.
A spokesperson for the Metropolitan Police said: “We understand the concern this has caused in the community and people can expect to see an increased police presence in the area.”
An investigation has been launched and anyone with information is asked to call 101 quoting CAD 14/15OCT25.
Alternatively, you can contact Crimestoppers anonymously on 0800 555 111.
