New Zealand has joined more than 30 delegations in walking out of the United Nations General Assembly during an address by Iranian president Mahmoud Ahmadinejad.
The walkout came on Thursday when Mr Ahmadinejad referred to conspiracy theories circulating after the September 11 terrorist attacks in 2001 that suggested the United States may have orchestrated the attacks.
The US said the remarks were abhorrent.
Mr Ahmadinejad said it was mostly American government officials who believed a terrorist group was behind the suicide hijacking attacks against the World Trade Center in New York and the Pentagon.
Another theory, he said, was that some in the US government orchestrated the attack to reverse the declining American economy and its grip on the Middle East in order to save Israel.
Mr Ahmadinejad also used the General Assembly podium to attack Israel. He has previously raised doubts about the Holocaust of the Jews in World War II and said Israel had no right to exist.
As in past years, the US delegation walked out during the speech. All 27 European Union delegations also did so.
