A suspect has been arrested after a man in his 50s died in a fight at a holiday park, police said.
Officers were called to St Minver Holiday Park near Wadebridge, Cornwall, at about 8pm on Saturday after a report of a "physical altercation" involving two men.
The man in his 50s suffered life-threatening injuries and was taken by paramedics to Treliske Hospital in Truro, but died two days later on Monday, Devon and Cornwall Police said.
A man in his 60s was arrested on suspicion of wounding by inflicting grievous bodily harm without intent, the force added.
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He was bailed until 21 August while detectives continue to investigate the what happened.
Devon and Cornwall Police referred itself to the police watchdog over how officers at the scene handled the case and the medical care given by police.
A spokesperson for the force said: "The matter is now subject to an independent investigation by the IOPC due to police contact.
"Devon and Cornwall Police is fully co-operating with the IOPC regarding this matter."
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