A man sexually assaulted a woman at her home in the NR3 area of the city after asking for a glass of water.
The man, believed to be a delivery driver, entered the woman's address in Bignold Road at around 1.30pm on August 20.
He asked for a glass of water and then pulled the victim into the living room and attempted to kiss and touch her without her consent.
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The woman's mother was in the garden at the time and after the man was told to leave he ran to the door and said he would be back.
He returned to the property on Thursday and this time was caught on camera by a home CCTV camera.
A spokeswoman for Norfolk Constabulary confirmed that they had received a report of sexual assault and that enquiries were ongoing.
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