Police have named a man they want to speak to in connection with a serious assault on a driver in Hove.
A 52-year-old man suffered serious head injuries when he was attacked by a cyclist in Portland Road just after 1200 GMT on Sunday.
Sussex Police believe he may have opened his door, causing three cyclists to swerve out of the way.
Detectives said they wanted to speak to a man called Paul, believed to be from the Seven Dials area of Brighton.
One of the cyclists, who was wearing green cargo trousers and had thick stubble, attacked the driver.
The victim was taken to the Royal Sussex County Hospital in Brighton and later transferred to Hurstwood Park in Haywards Heath, where his condition is said to be critical but stable.
'Skate park regular'
Det Insp Lee Horner said: "Extensive enquiries have been made by a team of detectives working on this case.
"I am now keen to speak to a man called Paul, who may be able to significantly assist us with this investigation.
"He is believed to live in the Seven Dials area of Brighton, possibly near Brighton and Hove Sixth Form Centre, and is known to visit The Level and Brighton skate park regularly.
"I am appealing directly to Paul and to anyone who thinks they know him to come forward."
Paul is described as white, in his late 30s about 6ft tall, with a distinctive shaped nose and dark brown greying hair.
A 36-year-old man from Brighton was arrested on Tuesday and released without charge.