According to local police, the woman was injured in the waters of Waihi Beach late Thursday afternoon and died shortly thereafter.
New Zealand police on Friday identified the woman as 19-year-old Kaelah Marlow from the city of Hamilton, about 391 kilometers (243 miles) from the capital Wellington.
“Initial indications are that she may have been injured by a shark,” New Zealand police said in a news release on Thursday.
Police said the coroner will eventually reveal the cause of Marlow’s death.
“We appreciate that her death was extremely traumatic for those who were on Waihi Beach yesterday and we provide victim support services to anyone who needs it,” police added.
According to the New Zealand police website, a non-fatal shark attack last took place in 2018. A man was attacked by a shark and was flown to a hospital for treatment.