A man has been arrested on suspicion of supplying a firearm following the fatal shooting of a police officer in a custody suite.

Sergeant Matt Ratana died in hospital after being shot at Croydon Custody Centre in south London in the early hours of Friday.

The arrest took place in Norwich around 2am this morning and the suspect is currently being detained at a south London police station.

Meanwhile, the suspect for the shooting remains in a critical condition in hospital and officers say they have not yet been able to speak to him.