Australian police believe explosives found on Sydney’s outskirts were evidence of a deadly escalation in a campaign of antisemitic arson and graffiti crimes that has been waged in major cities for months.

The explosives located in a caravan could have caused a 'potential mass casualty event', authorities have said.

Caravan in outer suburban Sydney contained industrial explosives and notes listing 'Jewish entities' Australian police were Thursday investigating if explosives stashed in an abandoned caravan outside Sydney were part of a planned "terrorism event" targeting Jewish residents.

SYDNEY: Australian authorities said Wednesday (j=Jan 29) they had seized explosives stored in a caravan in greater Sydney possibly intended for a "mass casualty" anti-Semitic attack.

"That caravan contained an amount of explosives and some indication that those explosives might be used in some form of antisemitic attack," he told a news conference.

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.

Three more incidents of antisemitic graffiti were found across Sydney on Thursday morning, leading Australian political leaders to warn of an escalation in hatred and decry as terrorism explosives found earlier in a trailer on the city’s outskirts.