A 45-year-old London man suffered a fatal stroke yesterday, when a man from the north of England tried to begin a conversation just moments after sitting down next to him on a Number 24 bus from Pimlico to Hampstead Heath.
Witnesses say the northerner seemed to target the lone male, who was on his way to work in Charing Cross when the incident occurred.
A woman onboard at the time told us: "He just sat down next to this poor man and began chatting.
"It was devastating to witness, and it'll be a long time before I can get the imagery of that northerner's face and callous behaviour out of my head.
"He even seemed to be smiling while he did it, for God's sake!"
Following the incident, the attacker was overpowered by fellow passengers, and handed over to police, who wrestled the man to the ground and handcuffed him.
He was then taken to Ebury Bridge police station where he remains in police custody, awaiting an appearance at Horseferry Road magistrates court on Monday morning, charged with affray, resisting arrest, manslaughter and overfamiliarity.
This latest incident comes just two weeks after a 50-year-old woman from Spitalfields in East London, died in the arms of fellow commuters when a man from Sheffield in South Yorkshire approached her on the platform of Shadwell tube station and reportedly said: "Ow do, missus! It's turned out reet nice again, ah see!"