A man has been arrested after a pensioner and a woman were stabbed to death in a residential care home, police have said.
A man in his 80s and a woman in her 50s were attacked at the home in Ilford, east London, on Saturday night. They died at the scene.
A 50-year-old man was arrested at the home on suspicion of murder and taken to an east London police station, where he remains in custody.
Both of the victims and the man arrested are believed to have been known to each other, but they were not related, Scotland Yard said.
Police were called to the home on Cecil Road at 10pm on Saturday.
Officers, London Ambulance Service and London's Air Ambulance rushed to the scene where the two victims were discovered with stab injuries.
The woman was pronounced dead at 22:50pm and the pensioner was declared dead 15 minutes later.
Their next of kin have been informed but formal identification has not taken place.
None of the three was a member of staff at the care home, officers said.
Post-mortem examinations will be held this afternoon at East Ham Mortuary.
Detectives from the Homicide and Major Crime Command are investigating the double murder.
Officers remain at the scene and will be speaking with residents to provide reassurance.
Detectives are not seeking anyone else in connection with the investigation.
Anyone with information is asked to contact police on 020 8721 4868, or Crimestoppers anonymously on 0800 555 111.