A 52-year-old is being questioned by police over the murder of a man who was stabbed to death on Boxing Day.
The victim, aged 64, was found with fatal injuries in Greenwich, south-east London, at about 2.10am on Saturday.
He was pronounced dead at the scene on Luxfield Road.
A 52-year-old man was arrested nearby and remains in police custody.
The Met Police said the victim and suspect were known to each other but are not related.
"Next-of-kin have been informed but officers await formal identification," a spokesman said.
"A post-mortem examination will take place in due course."
Anyone with information about the incident can call the police on 101 or contact Crimestoppers anonymously on 0800 555 111.