IPCC probes injury to man arrested by Sussex Police
The arrest and detention of a man who is critically ill in hospital is being investigated by the police watchdog.
The 44-year-old man was taken into custody in Brighton after being arrested by British Transport Police at Hove railway station on 31 May.
He was later seen by a nurse and taken to hospital with serious head injuries.
The Independent Police Complaints Commission (IPCC) said it was looking into the circumstances surrounding the man being taken ill.
He was arrested at about 17:45 BST on suspicion of a public order offence.
'Fell on platform'
The IPCC said it began its investigation on 4 June following a mandatory referral from Sussex Police.
The circumstances of how the man was injured are being investigated by British Transport Police, but it is believed he fell on the station platform at Hove railway station.
IPCC investigators are examining the circumstances of his arrest, his transportation to the Brighton custody suite and his detention.
The man is in a stable but critical condition in hospital.
IPCC commissioner Mike Franklin said: "I will ensure our independent scrutiny is applied to Sussex Police's handling of this detainee in order to be confident, if appropriate, lessons are learned as a result of this incident and if necessary make recommendations for forces to consider."