A teenager has been stabbed to death in Newham, east London.
The Metropolitan Police said the man, believed to be 18, was found critically injured with stab wounds at 15:30 BST in Chadd Green.
Officers and London Ambulance Service attended. The teenager was pronounced dead an hour later.
The Met said the next of kin had been informed. A post-mortem examination and formal identification are being arranged.
An investigation is under way, but there have not yet been any arrests.
A man in his 60s has been stabbed to death in west London.
Emergency services were called to St Mary’s Avenue in Southall at about 18:40 BST where they found the man suffering from a stab wound.
He was pronounced dead at the scene and his next of kin have been informed, the Met Police said.
A man in his 30s has been arrested on suspicion of murder and is in hospital under police guard being treated for minor injuries.
A crime scene and multiple road closures are in place in the area, Scotland Yard said.
Brentford have signed Greece international striker Nikos Karelis on a one-year deal.
The 27-year-old was a free agent after leaving Belgian side Genk earlier in the summer.
“Nikos is a player that will reinforce our options in attacking areas,” boss Thomas Frank told the club website.
“He is fit now and while he may take a while to be 100% ready to start in the Championship, I know he will have an impact.”
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A man who used a Rambo-style knife with a 10-inch blade to stab a stranger to death following a row over a cigarette has been jailed.
Jahmel Riley, 25, was convicted of murdering Dennis Anderson, 39, in the early hours of 10 February.
Riley attacked Mr Anderson at an off-licence on Lordship Lane, East Dulwich, after he had been refused a cigarette.
He was sentenced to a minimum of 23-and-a-half years at the Old Bailey.
Judge Nicholas Hilliard said the killing showed the dangers of carrying knives.
“What might otherwise have been just a verbal disagreement becomes a murder case because the defendant was carrying that terrible weapon,” he said.
Jurors heard how Riley had been “hustling” customers at the Pay Less shop for a cigarette, when Mr Anderson responded: “Why are you asking for cigarettes? Why don’t you get a job like the rest of us?”
Prosecutor Duncan Atkinson QC said a confrontation then began, where the defendant produced and unsheathed the large Rambo-style knife he was carrying.
Mr Anderson tried to disarm Riley and, as they both fell to the ground outside the store, CCTV showed Riley making a stabbing motion towards Mr Anderson’s neck.
The double-edged knife used in the attack was abandoned at the scene.
Riley claimed Mr Anderson was the aggressor and the stabbing was accidental.
However, prosecutors argued Mr Anderson’s injuries “told a very different story”, showing a series of deliberate blows to the upper body.
Mr Anderson’s partner, Leeane Manzi, said: “On the night that he was so brutally attacked, Dennis showed the heroic qualities that we all knew him for by trying to protect other members of the public and stop the situation escalating.
“This did not surprise us when we found out, as looking out for others summed up Dennis’ character.”
She added the attack had left their “hearts shattered and our lives turned upside down”.