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Five people were arrested on suspicion of affray after a "physical altercation" outside a supermarket, police said.
Officers were called to the car park at Tesco on Old Market Road in Stalham, north Norfolk, at 11:40 BST on Thursday.
A police statement said the incident followed a "verbal altercation" between the occupants of a vehicle and two pedestrians.
The pedestrians – a man and a woman – were left with minor injuries and a third woman also received minor injuries, they said.
Norfolk Police said two men in their 40s, two teenage boys and a teenage girl were arrested on suspicion of affray and questioned at Great Yarmouth and Aylsham police investigation centres.
They have been bailed until 30 June.
