Man died of heart disease while being questioned by police
A man who collapsed in front of police officers as he was being questioned about a brawl died as a result of coronary heart disease, a post-mortem examination showed.
The man, in his 50s, collapsed after the fight in Cobham on Sunday, at Hamilton Avenue.
Surrey Police said he had not been formally identified, but his next of kin had been informed.
A man in his 40s was arrested on suspicion of manslaughter.
He has since been released on bail.
The Surrey force said the Independent Police Complaints Commission (IPCC) had been informed of the man's death.
Police said up to 20 people - some said to have baseball bats - were involved in fighting in the early hours.
A van which left the scene shortly after police arrived was later stopped in Anyards Road, but the driver collapsed while talking to officers and later died.
Officers and paramedics tried to revive the man but he was declared dead at about 02:45 BST.
A man in his late teens was also arrested on suspicion of assault and a man in his 20s was arrested on suspicion of affray.
Both have been bailed.