Police are appealing for witnesses and information following two murders in Hackney.
Shortly before 20:00hrs on Wednesday, 4 April, officers on patrol in Morning Lane E9 were alerted to an incident close by.
Officers arrived in Link Street, junction with Morning Lane, and found a man suffering stab wounds. They assisted an off-duty paramedic in providing emergency first aid until the London Ambulance Service and London's Air Ambulance attended.
The man, aged 18, was pronounced dead at the scene at 20:24hrs. His next of kin has been informed and a post-mortem examination will take place in due course.
Two arrests were made late last night - [A] aged 17 and [B] also aged 17. They were both arrested on suspicion of murder.
Police were also called earlier yesterday, at 16:27hrs, to a bookmakers in Upper Clapton Road, E5, after reports of a man unconscious.
Officers attended with LAS and London’s Air Ambulance.
Despite the efforts of medical staff the man, aged 53, was pronounced dead at the scene.
His next of kin has been informed and a post-mortem examination will take place in due course.
The victim is believed to have been involved in an altercation with another man who then left the scene. There have been no arrests at this stage.
Both incidents have been passed to homicide detectives. At this stage there is no evidence to suggest the murders are linked.
Enquiries on ongoing to establish the exact circumstances of each incident and the possible motive.
Ch Supt Sue Williams, leading Hackney borough, said: "Sadly yesterday saw two people lose their lives in Hackney, a man aged 53 in Upper Clapton Road and an 18-year-old man in Link Street. Our thoughts are with the friends and families of both men at this awful time.
"My officers were alerted to the Link Street incident and did all they could to try to save the life of the teenager, rendering emergency first aid and chest compressions with the help of an off-duty paramedic until the ambulance service and London's Air Ambulance arrived. They are devastated they were unable to prevent yet another tragic death in the capital.
"I completely understand how alarmed and worried the local community will be at hearing the news this morning and we are working closely with the Homicide and Major Crime Command to solve these murders - two arrests have already been made in the Link Street incident.
"In Hackney we are working hard to prevent further violence and keep people safe - we have extra officers on the streets, both highly visible and in plain clothes carrying out a range of intelligence-led operations and patrols.
"We need to work together as a community to tackle violent crime - if you see or hear anything suspicious or have any information do not hesitate to call police on 101, via Crimestoppers anonymously on 0800 555 111 or in an emergency by calling 999."