An 80-year-old man who died after being assaulted in parkland died from a neck injury, say police.
Bhim Kohli died in hospital after being assaulted while walking his dog at Franklin Park, in Braunstone Town, Leicestershire, on Sunday evening.
A 14-year-old boy remains in police custody after he was arrested on suspicion of murder, while four other children have been released without further action.
Police said a post-mortem examination confirmed Mr Kohli died as a result of a neck injury, pending further tests.