Saturday, 7 October, will be a national day of action to end deaths in custody.

First Nations activists and supporters will host rallies across the continent in Naarm/Melbourne, Boorloo/Perth, Meanjin/Brisbane, and Kaurna/Adelaide.

The rallies will be calling on governments to implement in full all recommendations from the Royal Commission into Aboriginal Deaths in Custody (RCIADIC). More than 500 Indigenous people have died in custody since the Royal Commission brought down its findings in 1991. Many of the Royal Commision's more than 300 recommendations have not been implemented.

Senator Lidia Thorpe, Gunnai, Gunditjmara and Djab Wurrung woman and independent Victorian Senator representing the Blak Sovereign Movement, has thrown her support behind the national day of action and initiated an online petition calling on federal, state and territory governments to fully implement all recommendations from the Royal Commission.

The petition highlights a number of steps that the federal government could take immediately to end deaths in custody.

"Our people are the most incarcerated people in the world, and continue to die at the hands of a racist and violent system that has no regard for our safety," Senator Thorpe said.

"Separating our children, women and men from their families and their culture is a continuation of the cultural genocide that this nation is founded upon, and deaths in custody are the result of the ongoing violence perpetrated by the colonial project.

"Governments on all levels are not just failing to take urgent action but are actively funding the agencies, institutions and individuals that kill us, while refusing to hold a single individual or agency accountable."

Ngarrindjeri, Narungga, Kaurna and Noongar woman and Adelaide rally organiser Natasha Wanganeen, said "everyone should be standing on the streets to stop deaths in custody".

"If we don't stand up they will keep killing us," she said.

Senator Thorpe said that if the federal government "wants to show any respect for First Peoples and actually do their job", it will "stop killing us and implement in full the recommendations that have been sitting on the shelf for 32 years".

"This is a matter of life and death for our people and I call on supporters to attend a rally and sign the petition to end our people dying at the hands of the system," she said.