Police are appealing for help after a serious assault left a man fighting for life in south east London.
Scotland Yard released images of a second male they said might be able to assist them with enquiries.
He is wearing a red hooded sweatshirt and holding a mobile.
Officers were called to an attack in High Street, Beckenham around 01:22am on Sunday.
London Ambulance Service found a 42-year-old man with a head injury.
He was treated at the scene before being taken to a south London hospital where he remains in a critical condition.
The victim’s next of kin have been informed.
Detective Inspector Tom Revell, of the Met’s South Area Command CID, said: “Initial enquiries suggest that the assault occurred after a confrontation in the street between the victim and another man.
“We believe the person in the picture we are releasing will be able to assist us with our enquiries.
“If he sees this appeal, I would urge him to come forward and make himself known to the police.
“If anyone else who sees this appeal knows who he is, I would ask them to pass that information on to us.”
Anyone with information can call police on 101, quoting reference 536/17OCT, or Crimestoppers, anonymously on 0800 555 111.