A heritage-listed building used by Supercars organisers has been vandalised.
"No V8's" graffiti has been splashed across the Newcastle United Services Club.
Supercars organisers and engineering staff have been using office space at the club as they prepare for the event in November.
The United Services Club was formed in 1927 is one of the oldest clubs in Australia.
The building now housing the Club was erected in 1884 as the first Council Chambers for the Borough of Newcastle.
“We strongly condemn this illegal act perpetrated by vandals on a club which honours our war heroes," Supercars Australia said in a statement.
“It's a shame people who may be opposed to the event have expressed their views by vandalising a building which honours these servicemen and women."
“Supercars Australia supports the Newcastle United Services Club and currently donates to the club in return for using their office space for Newcastle 500 event and engineering staff."
“Club staff have this spent this morning removing the graffiti to restore the heritage listed building to its previous state. Police have been notified and are investigating.”