Detectives are appealing for witnesses to the incident on Garboldisham Road earlier this month.
Three men, carrying what is believed to have been a claw hammer, confronted the man.
Officers are keen to speak to anyone who may have seen any suspicious activity in the area.
A 26-year-old man has been cautioned by police after a spate of damage on Saturday night.
Police appealing for information after burglary in Bungay Road.
Police inspector says the force is taking action against a series of crimes and has called for vigilance from the public.