A complaint about a poster in Auckland that featured the dead body of Russian ambassador Andrey Karlov was not upheld by the Advertising Standards Authority.
The poster, which advertised the World Press Photo Exhibition, depicted the assassination of Karlov by an off-duty Turkish police officer while he was delivering a speech at an art gallery in Ankara, Turkey.
The photo of the assassination was the winner of the World Press Photo of the year.
The complainant said the advertisement was "a gruesome visual representation of real life events".
"These are not actors being depicted - these are real life people in a real life event," the complainant said. "I believe this advertisement promotes extremism, terrorism and violence and it is well beyond any ethical norms."