Former prime minister Tony Abbott says politics has hit a new low, after obscene posters were put up across his electorate of Warringah in Sydney.

Key points: Mr Abbott holds the seat on a 11.1 per cent margin

Mr Abbott holds the seat on a 11.1 per cent margin He does not blame any other candidates for the posters

He does not blame any other candidates for the posters His main challenger, Zali Steggall, tweeted that she had been under a "non-stop smear campaign from Mr Abbott and his supporters"

Several caricatured heads daubed with expletives, and others emblazoned with the word "Pell" were found in Manly, Mosman and Seaforth.

NSW Police released footage on Thursday afternoon of two men they believe could "assist with inquiries" into the posters erected in Manly overnight.

Police said they "became aware of posters" pasted onto walls in four separate locations in Manly depicting a Federal MP with "offensive language written across the top".

Mr Abbott said he did not believe any of his political opponents were to blame for the posters, which have also been plastered on walls outside his electorate.

The two men police said could help with their inquiries ( NSW Police )

Mr Abbott is under pressure from high-profile independent Zali Steggall, who is considered a chance to unseat him and his 11.1 per cent margin.

"This is a new nastiness in Australian politics, not suggesting that any of the candidates are somehow doing this but it is a fact that there are some pretty nasty people who want change here in Warringah," he said.

"I say to all the decent people in Australia, if you want to try to lift the tone of our public life and to lift the equality of our national conversation, don't in any way give aid and comfort to these nasty elements," he said.

Ms Steggall took to Twitter to condemn the posters.

"My volunteers have signed an extensive code of conduct," she wrote.

"They are under strict instructions not to engage in negative behaviour, as I have been the subject of a non-stop smear campaign from Mr Abbott and his supporters and do not condone that type of politics.

Independent Zali Steggall said her campaign was not responsible for the posters. ( Supplied )

"I strongly reject any allegation that the posters have anything to do with my campaign or my volunteers, and call upon anyone suggesting that it does to provide evidence."

Last week, lobby group GetUp! pulled an advertisement depicting Mr Abbott as an apathetic surf lifesaver who refuses to help a drowning swimmer.

The satirical ad mocking Mr Abbott's stance on climate change was widely criticised, even by the Royal Life Saving Society.