A 44-year-old man has been arrested after a man, believed to have been stabbed, was found dead in south London.
The Metropolitan Police launched a murder investigation after finding the body of a 50-year-old in a residential property in Tooting, on Monday.
Officers forced their way into a residential property on Tooting High Street at 3.12pm following concerns for the welfare of a resident.
The victim died at the scene after apparently being stabbed, Scotland Yard said.
The Metropolitan police said a 44-year-old man was arrested in Tooting on Wednesday on suspicion of murder and remains in a south London police station.
Police are awaiting the results from a post-mortem examination which took place on Wednesday.
Anyone with information should call police on 020 8721 4054 or Crimestoppers anonymously on 0800 555 111.