Inquiries continue into officers contact with a man who remains in serious condition in hospital after suffering a neck injury at a house in Feltham.
The Independent Police Complaints Commission (IPCC) investigators and an independent forensic scientist have been gathering evidence at the home where a 48-year-old man was hurt as police executed a search warrant last week.
The IPCC’s independent investigation began following a referral from the Metropolitan Police Service shortly before midday on Tuesday (May 13).
IPCC Commissioner Mary Cunneen said: "Our investigation will examine police contact with the man, and will seek to determine how he sustained his injuries.
"Our family liaison managers have met with his family to explain our role, and will be keeping them updated on the progress of our investigation.
"As the IPCC investigation is at an early stage, we are unable to provide any additional information at this time.”
Police said officers were attended a residential address in Feltham to make arrest enquiries and undertake a search warrant, at about 9.15am on May 13.
The man was injured and arrested at the scene.
He was rushed to hospital by the London Ambulance Service where he remains in serious but stable condition, and the incident has been referred to the IPCC.
IPCC continue their inquiries into the incident.