But Dr Mapp also said last year that he had ordered a report into allegations of mistreatment of detainees by Afghan forces. A spokesman said last night that the report would be published after the official release of the United Nations report "in the near future".
Mr Shetty, an Indian national who took over as Amnesty secretary-general last year, also urged New Zealand not to follow Australia's lead in refusing to accept people fleeing from Afghanistan, Sri Lanka and other Asian countries and seeking refugee status here.
Prime Minister John Key has described such people as "trying to jump the queue" ahead of the 750 people selected by the UN to fill New Zealand's annual refugee quota.
"You can't conflate the two issues," Mr Shetty said. "There are quotas in each country, 750 in New Zealand's case, although we are pushing for that to be increased to 1000. That is in no way connected to the asylum-seekers. So there is no queue-jumping.
"We'd like the Australians to follow the NZ example of how to treat refugees, not the other way around."
Dr Mapp said he understood that the United Nations Assistance Mission in Afghanistan (UNAMA) had written a report on the treatment of detainees by certain units and detention centres run by the Afghan National Directorate of Security (NDS).
Dr Mapp said it was inappropriate to release a Defence Force report until he had seen the UNAMA report, likely to be released next week. However, he said Afghan authorities were expected to treat prisoners according to international law and had made a commitment to New Zealand to do so.
New Zealand forces have taken only one detainee since 2009, who is held in a joint US/Afghan facility which Dr Mapp said he understood was not criticised by the UNAMA report.
Mr Shetty spoke at a public meeting in Auckland last night and speaks in Wellington at 1pm today, on the ground floor of BP House, 20 Customhouse Quay.