A man in his 20s has died after falling into the River Thames while being arrested by police.
Officers on patrol were alerted to a verbal altercation between a man and woman, who were known to each other, on Kingston Bridge in Kingston upon Thames, southwest London, at about 10.30pm on Friday.
Scotland Yard said an allegation of theft was made and police were in the process of arresting the man when he entered the water.
He had not been placed in handcuffs, the force added.
The Met's Marine Policing Unit, National Police Air Service, London Fire Brigade and the RNLI were involved in a search to find the man.
He was recovered from the water at about 12.30am on Saturday and treated by paramedics but later pronounced dead.
The man's family has been informed and enquiries are ongoing.
The Met said its Directorate of Professional Standards has made a referral to the Independent Office for Police Conduct.
