Police have launched a murder investigation after a 17 year-old was stabbed to death in Walthamstow last night.
The emergency services found the victim in a critical condition but he died later in hospital.
No arrests have yet been made. It was the second fatal stabbing in London over the weekend.
The police officer leading the investigation said he believed two men were "laying in wait" for the victim.
The teenager was walking along the High Street with one of his friends and, as they approached the junction of Buxton Road.