France conducted 193 nuclear tests in French Polynesia from 1966, especially at the Pacific archipelago's Moruroa and Fangataufa atolls, to help build up its atomic weapon arsenal. These included atmospheric and underground tests which had severe health impacts.

Tens of thousands of people in the French overseas territory are estimated to have been exposed to harmful levels of radiation, leading to a significant public health crisis that has been largely ignored.

The tests remain a source of deep resentment in French Polynesia, where they are seen as evidence of racist colonial attitudes that disregarded the lives of islanders.

"The inquiry has strengthened the committee's conviction that a request for forgiveness from France to French Polynesia is necessary," the report said.

"This request is not merely a symbol, nor a request for repentance. It must be a... fundamental step in the process of reconciliation between French Polynesia and the State," the authors said.

The report said the apology must be added to a 2004 law on French Polynesia's semi-autonomous status.

Residents in the south Pacific Ocean islands are hoping for compensation for radiation victims.

The investigative website Disclose, citing declassified French military documents on the nearly 200 tests, reported in March that the impact from the fallout was far more extensive than authorities let on.

Only a few dozen civilians have been compensated for radiation exposure since the tests ended in 1996, Disclose said.