The message, broadcast on Monday, warns Americans that “dangerous events” can occur in the “most unexpected of areas”.

“In the aftermath of the horrific incident at Bondi Junction this weekend, the US Mission to Australia would like to remind US citizens to remain vigilant, be aware of your surroundings and practice sound personal security and situational awareness,” the message read.

“As this incident showed, dangerous events can occur in the most unexpected of areas.

“Visitors to congested and popular tourist areas should pay particular attention to their surroundings and always follow the instructions of police and emergency response officials.”

The statement recommends Americans “avoid demonstrations”, be aware of their surroundings, review their personal security plans and “stay alert”.

But despite the new warning, the US State Department, America’s version of the Department of Foreign Affairs and Trade, continues to classify Australia as a “level one” travel destination, advising Americans to “exercise normal safety precautions” in the country.

America’s diplomatic mission is centred in Canberra, with consulates in Sydney, Melbourne and Perth.

Caroline Kennedy, the daughter of former US President John F Kennedy, is the American ambassador to Australia.

In a post to X, formerly known as Twitter, Ambassador Kennedy expressed her heartbreak at the shocking Bondi Westfield knife rampage that left six innocent people dead.

“We are deeply saddened to hear of the events at Westfield Bondi Junction in Sydney today,” she said on Saturday.

“Our hearts go out to the families and friends of those who were lost and wish the injured a speedy and complete recovery.”

Mass murder events are rare in Australia and Saturday’s violence has thrown the country into grief and shock.

The Bondi violence was then followed by an alleged terror attack at a church in western Sydney, where a 16-year-old boy allegedly attacked Bishop Mar Mari Emmanuel during a livestreamed sermon.

Video of the gruesome violence spread quickly across social media.

No charges have been laid over the church incident.