A man has appeared in court, charged with the murder of 87-year-old Thomas O'Halloran in the UK.
The Irish man was stabbed to death on his mobility scooter in London on Tuesday.
Lee Byer (44) - with an address of Allenby Avenue, Southall in west London - appeared at Willesden Magistrates' Court on Friday and was remanded in custody.
He was arrested on Thursday.
Police have said they are not looking for anyone else in connection with the investigation.
Mr O'Halloran was attacked on his scooter, before travelling about 70 metres and 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.
Mr O'Halloran was known for busking outside his local supermarket and train station to raise money for charity - including for Ukraine.
Police described him as a "very well known" and "much loved" member of the community.
Chief Superintendent Sean Wilson, who's in charge of policing for west London, said: "Mr O’Halloran had his life needlessly snatched away in a shocking act of unprovoked violence.
"I understand that the community will, quite rightly, be shocked and appalled by this incident as I am too.
"Mr O’Halloran was a very well known and much loved member of our community. My thoughts are with his family and friends."
Originally from Ennistymon in Co Clare, he is said to have returned home regularly.
He is survived by his family - including a sister, two brothers and nieces and nephews.
Additional reporting: IRN