An independent investigation has been launched by police authorities after a man drowned in the Thames at Kingston.

Met Police officers were flagged down by passers-by at around 10.30 last night (Friday, 26 August) and alerted to an incident that was ongoing between a man and a woman.

A statement from the Met says: "A verbal altercation involving a man and a woman known to each other was taking place and an allegation of theft was made."

Officers were in the process of arresting the man, but he had not been placed in handcuffs, when he entered the water, the Met said.

The force's Marine Policing Unit, the National Police Air Service, London Fire Brigade and the RNLI were all involved in the search for the man, who was believed to be in his 20s.

He was recovered from the water at about half an hour after midnight and was treated by paramedics, but was pronounced dead at the scene..

The man's family had been informed and the force has referred itself to the Independent Office for Police Conduct (IOPC), according to the Met, whose Deputy Assistant Commissioner Laurence Taylor said: "My thoughts, and those of the Metropolitan Police Service, are with the friends and family of the man who has sadly lost his life following this incident.

"I fully appreciate the public will be very concerned. We of course share that concern.

"The Met's Directorate of Professional Standards made an immediate referral to the Independent Office for Police Conduct (IOPC)as is protocol in any incident in which a person comes to harm following police contact."

The IOPC said its investigators had taken initial accounts from the officers involved.

An IOPC spokesperson said: "We have now begun the process of gathering and reviewing evidence, including footage of the interaction between officers and the man. Our thoughts are with the man's loved ones and all those affected by his death."