An old age pensioner has been arrested after a man was killed in a row over a disabled parking space at an Asda supermarket.
The 64-year-old man was killed near the entrance of the supermarket in Biggleswade, Bedfordshire on the afternoon of Saturday 3 August - as the store bustled with customers doing their weekend shopping.
The victim, from Sandy, died after falling to the ground from a single punch. He was taken to Addenbrookes hospital but died hours later.
Police said the elderly suspect fled the scene after the attack but was tracked to his home, where officers arrested him on suspicion of manslaughter.
An Asda manager was first on the scene and administered first aid to the victim while ambulance rushed to the scene.
A spokesman for the food giant said: "Our thoughts are with the gentleman's family during this difficult time."
Detective chief inspector Tim Redfearn called the attack "tragic and devastating" for the victim's family.
He 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."
Potential witnesses have been asked to call Befordshire police with information on 101 or Crimestoppers anonymously on 0800 555 111.