Police are searching for a man after a woman was indecently assaulted at the Bay Dreams concert in Nelson.
Photo: Facebook / Bay Dreams
The incident happened between 10pm and 11pm on 4 January at Trafalgar Park.
Police said the assault took place in the middle of a large crowd during the final act of the night - Tyler, The Creator - on the main stage.
The man they are looking for is described as being in his mid-20s, is 190cm tall and of lean built with a sun-tanned complexion.
He was wearing a distinctive high visibility orange mesh vest and he may have been with a group of similar-aged men, police said.
Anyone who has any information should contact the Nelson police or detective Neil Kitchen on 03 546 3851.