Police in Western Australia on Wednesday released images of the men wanted for questioning over separate incidents in June and May during which "two kangaroos were tortured and killed".
A man was seen brandishing knuckle-dusters in one of the pictures, alongside another suspect with his face pixelated and wearing a similar weapon on his hand.
Animal cruelty: Testing on animals is being replaced with a more reliable method
The hunt for the alleged kangaroo killers comes on the heels of an arrest made after sickening footage of a driver running over emus in the outback sparked a social media storm.
The video, described as "horrific cruelty" by animal welfare groups, showed a man ploughing into at least a dozen of the ostrich-like birds in his four-wheel drive, counting and laughing loudly each time he hit one.
A 20-year-old man was arrested in Victoria late Friday over the incident and was expected to face a raft of charges related to animal cruelty.
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