A 45-year-old man was assaulted in Cotmer Road in Lowestoft.
He was walking home at about 12.30am on Sunday, July 26 when he passed a man arguing with a woman.
Police say it is not clear what happened next, but the 45-year-old suffered bruising, a cut forehead and grazed his elbow and knee.
Police are keen to trace the couple arguing, or anyone who was in the area at the time.
Call PC Kevyn Durrant on 101, quoting LO/15/4248.
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