Nelson Police arrested a 52-year-old man on Monday evening following a report of an indecent assault on a woman in Richmond.
The alleged assault happened about 11.30am after the man approached the elderly woman at her home and asked for a glass of water. He has been charged with indecent assault and will appear in the Nelson District Court on Tuesday.
Detective Senior Sergeant Craig Johnston says the man is believed to have been riding a bicycle around the Richmond-Appleby area and police are keen to hear from anyone else who may have been approached by the same man.
Anyone who has concerns they would like to raise should call Nelson Police on 5463840.