Police are appealing for witnesses and information after a pensioner was stabbed to death at his home in southwest London at the weekend.
Officers discovered the body of 73-year-old Joseph Griffiths after responding to reports of a burglary at the house in Fulham during the early hours of Saturday morning.
He had been stabbed a number of times in what police described as a "violent attack" at the address on Hazlebury Road.
Local media reports suggested the grandfather was initially found by his 72-year-old wife, Judith. Another relative was also said to be at the home. Neither of them was injured.
The pensioner was pronounced dead at the scene and a post-mortem later revealed Mr Griffiths, who has two grown-up sons, had been fatally stabbed.
No arrests have been made so far, and police are now investigating the possibility that Mr Griffiths, who ran a car repair centre in south London, was killed as he disturbed an intruder.
Detective Chief Inspector Steven Lawrence, of the Met's Homicide and Serious Crime Command, said: "We continue to appeal to anyone who may have witnessed anyone suspicious prior to or after this incident or anybody who has any information which would assist us.
"We are conducting house to house inquiries in an around Mr Griffiths' home and forensic examinations are also ongoing."
Anyone with information should contact the Belgravia Police Incident Room on 020 7321 7228 or call Crimestoppers anonymously on 0800 555 111.