Northern Grampians police are investigating an incident in Halls Gap on Thursday night.
Stawell Sergeant Eddie Malpas said between 6.30pm on August 6 and 8.30am on August 7, "obscenities were marked into freshly laid concrete at a private residence on Mt Zero Rd".
"Police are appealing for information in regards to this matter. If anyone was in the area, saw or heard anything suspicious, we are asking that they contact Halls Gap Police on 5356 4411 or Crime Stoppers," he said.
"We often speak to people in the community who have important information, however they believe it may not be worthy of getting in contact with us at the time.
"I have always said, the smallest piece of information could complete the larger puzzle so please contact us if you believe you are able to assist with the investigation."