WA Police have confirmed an operation to seize hundreds of guns from so-called sovereign citizens was conducted because of a fatal police shooting in Victoria in late August.

Authorities confirmed a state-wide operation concluded on Friday that saw search warrants conducted at 70 addresses of people aligned with the sovereign citizen movement.

It comes after two police officers in Victoria were shot and killed, allegedly by Dezi Freeman, a self-confessed sovereign citizen. He is still on the run in country Victoria.

Sovereign citizen is a term for people who hold extreme anti-government views, who believe laws and regulations don't apply to them.

WA Police Commissioner Col Blanch said despite their beliefs, sovereign citizens were not above the law.

"The recent murder of two serving

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