Former prime minister Tony Abbot arrived to his office on Tuesday morning to somewhat of a disgusting surprise - a hollowed out book filled with poo.
Police attended the Warringah MP’s Manly office after someone dumped the unsavoury item on its doorstep overnight, Daily Telegraph reported.
The word “unpopular” was the only thing written across the book’s black cover, with white marker used to write letters around the printed word “pop”.
Inside were carved out pages and a dark coloured substance believed to be faeces of unknown origin.
A statement from Mr Abbott’s office said activists had stooped to a new low.
“They went from the gutter last week and they’ve gone to the sewer this week,” the spokesman said.
Police collected the book and its contents which they said would aid in the development of its formal investigation.
"Police attended and the item has been collected," a police spokesman told AAP.
Police also appealed for information late last week after posters featuring Mr Abbott appeared in his Warringah electorate with expletives written across his forehead.
Other posters had "Pell" written across them - an apparent reference to the Liberal MP's friend and convicted paedophile Cardinal George Pell.
John Howard endorses Abbott in new video
Mr Abbott on Tuesday released a video on Twitter featuring former prime minister John Howard backing his campaign.
Mr Howard said Warringah contained many people who were "not wealthy" but "successful through hard work and enterprise".
"Many of them have arranged their retirements on the basis of existing laws," the 79-year-old said.
"(Bill) Shorten wants to hit them with new and unfair taxes and there's only one candidate, Tony Abbott, who'll fight tooth and nail to prevent this huge tax impost."
Mr Abbott is facing a serious challenge from independent Zali Steggall, with recent opinion polls suggesting he'll struggle to retain the seat he's held for 25 years.
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