More than 100 firearms have been seized in a raid targeted at so-called sovereign citizens across Western Australia, an operation that authorities say was sparked by the fatal shooting of two police officers in Victoria.

WA Police have identified about 1,000 people who have professed sovereign citizen beliefs across the state, with 70 of those owning guns.

The properties of those gun owners were searched during an extensive operation last week, with 135 firearms seized and 44 gun licenses cancelled.

Police Minister Reece Whitby said WA Police had been gathering intelligence on people with sovereign citizen beliefs since the shooting death of two police officers in Porepunka in August.

WA's top judge issues warning over 'sovereign citizens' Photo shows WA Chief Justice Peter Quinlan

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