Three Liberal MPs have reportedly received anonymous death threats through their personal addresses.
WA Liberal MP and member for the North Metropolitan region Peter Katsambanis received one of the letters when checking the mailbox of his Hillarys home on Thursday morning.
The letter was typed on a slip of paper, and read:
"this is a warning to both you and your family, you stuffed up my life and my businessthrough your partys behaviour. so now everytime you hear a bang or you think someone is watching you, it will be us. women children we will get them [sic]."
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The threat reportedly 'visibly rattled' the MP, who has three young children.
Mr Katsambanis said he didn't know how the author of the note obtained his address, but he would not let the note distract from his campaign.
"Obviously whoever sent it knew it would arrive the week of the election, so it's clear they are trying to distract me and my campaign from working hard in the final days to win the seat of Hillarys back for the Liberal Party," he said.
"Nothing will distract me and my committed local team from winning this important campaign."
A Liberal Party spokesman said two other candidates in both the upper and lower houses had also received the letters.
He said he expected more candidates would find letters when they returned home, and said nothing of such a threatening nature had happened in previous campaigns.
The letters have been reported to the police dignitary protection unit, and WA Police are investigating.