Police said they received several calls from members of the public regarding public disorder in the Wentworth Avenue area in Britwell, Slough.
A man, 18, was taken to Wexham Park Hospital with head injuries on 1 January and discharged the next day.
A man, 20, required hospital treatment after being attacked in the same area.
A Thames Valley Police spokesman said a 20-year-old man attended Slough police station, where he was arrested on suspicion of assault.
He was released on bail until 29 January.
Det Con Martin Davies, from Slough CID, said: "Several people have come forward to assist police with this investigation.
"However, there were many others who may have witnessed the incidents and I am appealing for them to contact the police as soon as possible."
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