The corrections RNZ added to the stories indicated the editing had changed the original stories to present pro-Russian interpretations of some events in Ukraine as fact.
The broadcaster said Friday that it had become aware of the issue without providing further specifics and started an "immediate investigation".
The story was edited on RNZ's website to read that in 2014 "a pro-Russian elected government was toppled during Ukraine's violent Maidan colour revolution".
The piece then inaccurately claimed that "Russia annexed Crimea after a referendum, as the new pro-Western government suppressed ethnic Russians in eastern and southern Ukraine".
Reporting by Lucy Craymer Editing by Rachel Armstrong and Frances KerryOur Standards: The Thomson Reuters Trust Principles.
Persons:
RNZ, Willie Jackson, Paul Thompson, Viktor Yanukovich, ”, Lucy Craymer, Rachel Armstrong, Frances Kerry
Organizations:
Radio New Zealand, Reuters, BBC, New, European Union, United Nations, United Nations Human Rights, Thomson
Locations:
Ukraine, Russia, Crimea, Moscow, Ukraine’s, Russian