Sydney restaurateur Judith Lewis couldn’t save the mezuzah, a framed parchment inked with Hebrew prayers, that was hanging in her family’s café when arsonists set it alight in the early hours one Sunday in late October.

The police said they were investigating whether “overseas actors” were involved in the vandalizing of synagogues and a day care center.

Australian Federal Police (AFP) Commissioner Reece Kershaw said it was possible that cryptocurrencies - which can take longer to identify - had been used. He added that police were also investigating whether young people were carrying out these crimes and whether they had been radicalised online.

Four vehicles and the former home of a Jewish community leader were defaced in Sydney early Friday, with two cars set alight, in the latest antisemitic attack condemned by Australian authorities, who vowed to “hunt down” the perpetrators.

Australian detectives are investigating whether foreign actors are paying criminals to commit antisemitic attacks in the country.