A 44-year-old man has been arrested on suspicion of murder after a grandfather was stabbed to death on his mobility scooter.
He was arrested at an address in Southall, west London, in the early hours of this morning and remains in custody, police said.
Thomas O’Halloran, 87, was attacked on a road in nearby Greenford on Tuesday afternoon.
Police believe he manged to travel about 70m on his scooter before flagging down a member of the public for help.
He was pronounced dead at the scene despite the efforts of police and paramedics to save him.
Officers had earlier released images of a man “fleeing the scene” in Cayton Road “armed with a knife”.
Mr O’Halloran was known for playing the accordion outside his local supermarket to raise money, with police describing him as a “very well known and a much-loved member” of the community.
Detective Chief Inspector Jim Eastwood said: “I would like to thank the public for their overwhelming support following this horrific incident.
“As a result of the release of a CCTV image yesterday, an arrest has been made and this investigation is progressing at pace.
“Mr O’Halloran’s family have been updated with this development and continue to be supported by specially trained officers.
“I would reiterate their previous request that their privacy is respected by everyone as they continue to come to terms with their tragic loss.”