A young man has died after being stabbed in east London, bringing the total number of suspected murders in the capital so far this year past 50, the Metropolitan Police said.
The man, thought to be in his 20s, was found fatally wounded by officers on patrol on Link Street, Hackney, just before 8pm on Wednesday.
Despite receiving first aid he died at the scene around half an hour later. There have been no arrests and a crime scene remains in place.
In the same borough just hours earlier a man in his 50s died outside a bookmakers in Upper Clapton Road following a suspected fight, the Met said.
The attack has added to the UK's soaring rate of knife crime, with fatal stabbings in England and Wales at their highest levels since 2010/11.
The escalating violence has been especially acute in London, with 13 people killed within two weeks last month.
On Tuesday, 16-year-old Amaan Shakoor became the youngest murder victim in London so far this year after he was fatally shot on Monday in Walthamstow.
His death came after that of Tanesha Melbourne, 17, who was gunned down around 30 minutes earlier just three miles away in Tottenham.
Both were apparently casualties of gang violence.
Met Commissioner Cressida Dick has blamed social media for the rise in killings, particularly among children, saying trivial disputes could escalate into violence "within minutes" when rivals set out to goad each other on the internet.
Scotland Yard said it is currently investigating 55 suspected murders since the start of 2018, including the deaths of two children whose bodies were found in Sussex.