Mr Ago was found injured and was taken to hospital fighting for his fighting for his life but has since died.
Police have now arrested four men, aged 17, 22, 25 and 43 on suspicion of murder. They are being held at police stations in south London.
Detective Chief Inspector Kate Kieran, who is leading the investigation, said: ‘The victim in this case suffered the injuries that would ultimately claim his life in broad daylight, outside a residential address.
‘These arrests mark significant progress in the investigation and I hope it reassures the community that officers are working hard to bring justice to the victim and his family.
‘This is now a homicide investigation. I am still keen to hear from anyone who witnessed the incident or who may have dash cam footage of the stabbing itself or the events surrounding it.
Mr Ago was found injured and was taken to hospital fighting for his fighting for his life but has since died. Police have now arrested four men, aged 17, 22, 25 and 43 on suspicion of murder. They are being held at police stations in south London
It comes amid a spate of carnage in the capital, which saw a popular 55-year-old florist stabbed to death in Islington, a man chased through London’s Hyde Park by a gang wielding machetes, and a 15-year-old boy stabbed in Chelsea harbour- among other grizzly attacks
‘If you can help please don’t hesitate, call us direct or remain anonymous, but either way please do make the call.’
The shocking scenes last Wednesday came on a night of devastating bloodshed across London as soaring temperatures drove a spike in violence.
At least four people were rushed to hospital with stab wounds in the capital within 24 hours, with one man fighting for his life after being hacked in a brutal machete fight between four thugs.
Hours after the incident in Greenwich, dozens of riot police descended on Brixton after officers at the scene of a stabbing and shooting had objects – including bricks – hurled at them.
And shortly after that, less than three miles away in Norwood, police were called to another stabbing, which saw a man rushed to hospital with stab wounds.
BRIXTON: Later the same evening, dozens of riot police descended on Brixton after officers were attacked by a large group of men while attending the scene of a shooting and stabbing around 9.35pm
Then, in Shepherd’s Bush in west London, a man was glassed in the face by a thug – with officers still at the scene this morning.
The horrific day was the peak in a spate of carnage in the capital, which saw a popular 55-year-old florist stabbed to death in Islington, a man chased through London’s Hyde Park by a gang wielding machetes, and a 15-year-old boy stabbed in Chelsea harbour- among other grizzly attacks.
Leading criminology Professor David Wilson told MailOnline that the heat is likely to blame, with cases of violent crimes soaring as the weather gets hotter and popular outdoor spaces pack with eager sunseekers.
Temperatures had peaked at 82.9F (28.3C) in Northolt, after hitting previous 2021 highs on Tuesday with 79F (26.1C) in Cardiff and 77.2F (25.1C) at Kinlochewe in the Highlands on bank holiday Monday.
SHEPHERD’S BUSH: A police officer standing by a cordon in Shepherd’s Bush, west London, after a stabbing that night
NORWOOD: A man was discovered with stab wounds and was rushed to hospital just before 11pm (the aftermath, pictured)
Professor Wilson – whose book A Plot to Kill: A True Story of Deception, Betrayal and Murder in a Quiet English Town will be released this month – told MailOnline: ‘There is a well established connection between violent crime and hot weather.
‘What is difficult to be definitive about is why that should be the case. Most violence occurs in places that are hot, polluted and overcrowded.’
It is often in hot, crowded pubs where confrontations – mostly between drunk revellers – occur, he added.
‘It is hot and people are crowded together and bumping into each other there are more situations where people are going to potentially get angry with each other and fight with each other’.
He also highlighted that warm weather can make it ‘difficult to fall asleep’, leaving people feeling agitated and confrontational.