The fate of 62-year-old Louisa Akavi, kidnapped by armed gunmen in 2013, remains unknown - weeks after victory was declared against the violent militant organisation.
The International Committee of the Red Cross (ICRC) has broken its silence after many years, calling for information that could help to locate Louisa and two ICRC drivers, Alaa Rajab and Nabil Bakdounes, both Syrian nationals.
Two other hostages, British journalist John Cantlie and Italian priest Paolo Dall'Oglio, have been openly named in international media reports in past years.
When media outlets were contacted by the New Zealand government about the risk to Louisa, references identifying her more closely were changed or removed, in keeping with non-publication agreements being observed by other media organisations.
The Australian newspaper also ran the story on 8 February this year, about "the fates of New Zealand, British and Italian hostages" referring to a "female Red Cross nurse from New Zealand".