A Victorian golf course has been plastered with swastikas, vulgar graffiti and a homophobic slur. Vandals sprayed the Nazi symbol at the Cranbourne Golf Club between 7pm on Tuesday and 9am on Wednesday.

Victoria police confirmed on Thursday it was investigating. The Anti-Defamation Commission chairman Dvir Abramovich condemned the graffiti on the club’s fourth green as “another sickening” attack.

“Another day, another sickening and chilling incident of swastika vandalism, and if this hate spree continues, Melbourne will soon be known as the swastika capital of Australia,” he said in a statement.

“This is not just graffiti on the ground – it is an attack on all of us, and I never I thought I’d say this, but this is becoming the norm.”

Jewish golfers founded the club in 1953 to cater for those who were prevented from joining other clubs due to their religion, Dvir said. A witness, who did not use his real name, told the commission it was a “disgusting” and “cowardly” attack.

Dvir has called on the state government to organize a roundtable to find measures to “fight against this toxic bigotry”.