Police investigating the killing of 87-year-old Thomas O’Halloran who was stabbed to death have released pictures of a man seen running from the scene armed with a knife.

Detectives have issued images of a man they are keen to identify as a matter of urgency following the killing of Mr O’Halloran, who had been riding a mobility scooter.

“He was seen fleeing the scene armed with a knife,” the Metropolitan Police said.

Detective Chief Inspector Jim Eastwood, who is leading the investigation, said: “He is clearly a dangerous individual and people are advised not to approach him, but to call us immediately on 999 if they know him or have any information regarding his whereabouts.”