Australia posted a US$659,000 reward Saturday for the arrest of a gunman on the run for a 12th day after allegedly killing two police officers.

Police in the eastern state of Victoria said they were offering the "life-changing" amount in their hunt for the 56-year-old fugitive, Desmond Freeman.

Freeman is accused of opening fire when police arrived at his home in Victoria with a search warrant.

The shooting killed 59-year-old detective Neal Thompson and 35-year-old senior constable Vadim De Waart. A third officer had surgery after being wounded in the lower body.

More than 450 police have been searching in vain for the alleged shooter, a reported conspiracy theorist who has bush survival skills, after he fled into dense forest by the small town of Porepunkah.

Now, Victoria police say

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