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20 February 2013, 17:09 | Updated: 20 February 2013, 17:23
The man and woman suffered facial injuries during the incident on Clover Hill Road.
It happened at around 12.30am on Sunday 10 February 2013.
Officers want to speak to the man pictured as he may be able to assist with inquiries into this assault.
Contact PC Chris Alexander at Norwich West Safer Neighbourhood Team on 101 or Crimestoppers anonymously on 0800 555 111.