Residents of Stanmore in Sydney's inner west awoke this week to find “NO” tags spread across their homes, cars and local artworks.
Locals said they were shocked and angered by the vandalism, while the culprits have not yet been identified by police.
Steph Sands said she had no doubt the tags were related to the current national survey on same-sex marriage.
“These aren’t graffiti tags – they are a political statement,” she said.
Police believe the damage occurred at around 8pm on Sunday night with 11 different properties and one vehicle damaged at Liberty Street, Harrow Road and Trafalgar Street.
It’s unknown at this stage if multiple people or an individual was responsible for the damage.
Another local, Troy Ward, said his car was covered with a yellow “NO” that covered the entire rear window.
“I was surprised to see it painted on my car,” he said.
Mr Ward said he went out at around 9.30pm on Sunday when he noticed the tags, “clearly the culprit did this quite early in the evening, I touched the paint to see if it was still wet [and] it wasn’t,” he said.
Inner West mayor Darcy Byrne took to social media to express his disappointment with the those who were responsible for damage on the popular “monkey mural”.
"Tomorrow morning, I'll get a team out to clean and restore the mural, making the political impact of your vandalism as fleeting and insignificant as it deserves to be,” he said.
A graffiti removal crew were seen working to remove damage to the mural from around midday on Tuesday at the direction of Inner West Council.
Crews told Central News they were working hard to not cause damage to the local mural but the strong chemicals have been removing the original paint underneath in some areas.
Mr Ward said his girlfriend's home was also tagged, “We first saw the monkey mural art covered in the "No's" then saw more along Harrow Road and we gasped,” he said.
It’s the second graffiti incident with what appears to be political ties, after last week rainbow flags were found hanging on the front fence of a Brisbane home covered with swastikas.
All votes for the same-sex marriage survey must be provided to the Australian Bureau of Statistics by November 7. Police are urging any witnesses and any residential or commercial properties in the area that may have CCTV to come forward and contact Newtown Police via Crime Stoppers on 1800 333 000.