Police should "throw the book" at a man who allegedly lobbed a homemade bomb into a crowd at a rally in support of Indigenous Australians, Prime Minister Anthony Albanese has said.
The 31-year-old man was detained after hurling an item into a throng of around 2,500 people who had gathered in Perth to mark Australia Day, police said.
While many across Australia celebrated the country's national day on Monday, many Indigenous Australians and their advocates held "Invasion Day" rallies to commemorate the cultural destruction of Indigenous communities under European settlers.
Police said the device did not detonate and no injuries were reported.
Speaking to reporters on Tuesday, Albanese said the the incident was "quite shocking", but added that he could not comment any further as "the matter is now before the courts".
