UPDATE: A reward of up to $5,000 is being offered for information on the motorist responsible for the deaths of 17 kangaroos in Wacol this week.
Their bodies were found on Monday morning on Grindle Rd.
Sixteen were dead, and one was so badly injured that it had to be euthanised.
Tyre tracks indicate that the driver deliberately left the road to target the kangaroos.
The perpetrator has not been found.
People for the Ethical Treatment of Animals (PETA) Australia is offering a reward for information leading to the identification and conviction of the person or persons responsible the deaths.
"Animal abusers are cowards", says PETA Australia Director of Campaigns Jason Baker. "We're appealing to anyone with information on the person or persons responsible for these cruel acts to come forward so that the perpetrators can be put where they belong: in jail."
Cruelty to animals carries a penalty of up to $235,000 or three years' imprisonment under the Animal Care and Protection Act 2001.
Anyone with information about this case is encouraged to call the RSPCA on 1300 264 625.
For more information visit PETA.org.au
EARLIER: A motorist has deliberately run down and killed 17 kangaroos on a stretch of road at Wacol.
The animals were discovered on Monday morning along Grindle Rd (pictured above) between the women's and men's prisons.
RSPCA spokesman Michael Beatty said many of the roos were young and one had to be euthanised.
"They have definitely been deliberately run over," he said. "You can quite clearly see the tyre tracks where they have gone off the road to hit them."
Anyone with information is urged to contact Crime Stoppers on 1800 333 000.