Police on patrol in Filey intervened when the violent row involving two men happened outside the takeaway on Murray Street at around 10pm on Friday.
A spokesperson for North Yorkshire Police said: "It is believed to have involved a dispute between the customers about the wearing of face masks as part of Covid-19 precautions.
"A 38-year-old man from Filey was arrested and later received a caution for threatening and abusive behaviour to provoke unlawful violence.
"A 56-year-old man from Doncaster suffered minor injuries after being punched.
"The investigation has been completed."
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