A man has been killed in a row over a disabled parking space in a supermarket car park, police said.
A 65-year-old man has been arrested on suspicion of manslaughter following the incident at an Asda supermarket car park in Biggleswade, Bedfordshire, yesterday.
The victim, from Sandy, was taken to Addenbrookes Hospital in Cambridge, where he died this afternoon, a spokesman for Bedfordshire Police said.
The family of the victim, who was aged 64, were at his bedside when he died.
Detective Chief Inspector Tim Redfearn, who is leading the investigation, said: "The men were waiting in the disabled parking area at the time and got into a disagreement about parking.
"We know they became involved in a disagreement which resulted in one man punching the other knocking him to the ground.
"It would seem an argument over nothing has led to tragic and devastating consequences for both men and their families.
"I know the supermarket car park would have been very busy on a Saturday afternoon so if you were there at the relevant time please contact the police in confidence."
The suspect left the supermarket following the incident at around 3pm but was arrested at his home address nearby a short time later.
He was being held in custody and has now been rearrested on suspicion of manslaughter, police confirmed.
Anyone with information is asked to contact Bedfordshire Police on 101 or the independent charity Crimestoppers, anonymously, on 0800 555 111.