A 32-year-old man sustained a broken arm after he was struck by a plank of wood after answering the door of a flat in Derry at the weekend.
The incident occurred at around 9.15pm on Friday evening last when the man was confronted by two men and a woman after answering a knock on the door of a flat on Strand Road.
A PSNI spokesperson asked anyone with information to contact police non-emergency 101 telephone number.
Alternatively, it can be provided to the Crimestoppers charity anonymously on 0800 555 111.
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