A teenage boy died after he was found with stab wounds in the street early today, Scotland Yard said.
A police spokeswoman said officers on routine patrol found the teenager shortly before 1am in Amhurst Road, Hackney, east London.
He was pronounced dead at the scene.
Amhurst Road is close to Hackney Downs and Hackney Central rail stations.
The police spokeswoman said a post-mortem examination would be carried out in due course.