A 23-year-old man has been arrested in hospital on suspicion of the murder of Croydon cop Sergeant Matt Ratana.

Sgt Ratana was killed in a shooting at Croydon Custody Centre at around 2.15am on the morning of Friday, September 25.

Officers and paramedics treated him at the scene in Windmill Lane and he was taken to hospital by London Ambulance Service. Very tragically he subsequently died at hospital.

Read more: Maori haka performed at funeral of Matt Ratana

A 23-year-old man, widely reported as Louis De Zoysa, was detained after he reportedly shot himself following the incident.

He was rushed to hospital in a critical condition, though he has since stabilised and is no longer considered to be in a life-threatening condition.

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Funeral goers performed a traditional maori 'haka' war dance at Matt Ratana's funeral last week

Today (November 13) he was considered fit to be arrested on suspicion of murder.

A Met Police spokesman added: "As the man remains in hospital, officers will liaise with the relevant medical and legal teams to make an assessment of when he will be fit for interview.

"Specialist family liaison officers from the Met’s Specialist Crime Command are in regular contact with and supporting Matt's partner, his son and wider family. They have been informed of today’s arrest."