An elderly man riding a mobility scooter who was stabbed to death in a "shocking act" of "unprovoked violence" in west London has been named by police as Thomas O'Halloran.
The attack on the 87-year-old happened on Cayton Road in Greenford, Ealing, just after 4pm on Tuesday.
Police were called to reports of a man with stab injuries, and despite the efforts of paramedics, he was declared dead at the scene.
Mr O'Halloran, a grandfather, played the accordion and would busk outside the local supermarket to raise money.
Metropolitan Police Chief Superintendent Sean Wilson described the incident as a "shocking act" of "unprovoked violence".
Speaking at the crime scene on Wednesday, he said: "I understand that our community will quite rightly be shocked and appalled by this incident, as I am too