(CNN) Australia's Prime Minister Scott Morrison insisted that foreign lobbyists won't influence his country's gun laws, after an investigative report alleged the country's far-right One Nation party had sought donations and guidance from the National Rifle Association of America (NRA).

In an Al Jazeera documentary broadcast Monday, an undercover reporter filmed meetings between people who belong to the two groups. In multiple sessions, recorded secretly, NRA representatives advised on general tactics to weaken tough firearm restrictions. Al Jazeera says its reporter spent three years undercover to gather information.

One Nation was hoping to raise up to $20 million in political donations from supporters of the United States gun lobby, Al Jazeera reported. Last year, Australia passed legislation banning all foreign donations to domestic political parties beginning January 2019. The meetings took places in September 2018, before the legislation came into effect.

CNN has not independently confirmed Al Jazeera's reporting. CNN has contacted both the NRA and One Nation for comment.

Reports that senior One Nation officials courted foreign political donations from the US gun lobby to influence our elections & undermine our gun laws that keep us safe are deeply concerning. — Scott Morrison (@ScottMorrisonMP) March 25, 2019

Morrison said on Twitter that Australia's gun laws would not change.

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