Emergency services responded to reports of an altercation between two men in Yarrowee Street, Sebastopol on Friday night.
Police have been told a man 25-year-old victim was assaulted by a 33-year-old man about 9pm.
The victim sustained a minor injury and was treated by paramedics at the scene.
Police believe parties are known to each other.
The investigation remains ongoing.
Elsewhere, a man was taken to hospital with an arm injury after his motorbike clipped a parked car on Kline Street in Ballarat East.
The incident occurred about 9.15pm.
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