At least 84 kangaroos have been found dead with gunshot wounds and traumatic injuries after being hit by a vehicle in regional Victoria.
The conservation regulator is investigating after at least 65 young and adult eastern grey kangaroos were found dead in Gobarup in central Victoria.
Another 19 dead kangaroos with similar injuries were found near Hotham.
In Gobarup, authorised officers found kangaroo bodies scattered across 190 hectares of land after they were alerted on June 22 to the mass deaths by a local wildlife refuge which had found dozens of the marsupials dead in private paddocks.
The keeper who found the animals had to euthanize three live kangaroos due to their severe injuries.
Two cubs were rescued and are being cared for by the local shelter.
Officers have spoken to a landowner who is not a person of interest in the alleged crime.
On June 23, about 170 miles west of the scene, near Hotham, about 19 eastern grey kangaroo carcasses were also found.
Authorities are investigating after up to 84 kangaroos were found dead in regional Victoria in what appears to be a killing spree.
It is illegal to hunt wildlife in Victoria without a permit, with penalties including fines and jail.
Regulators were alerted to the deaths by a wildlife carer after a member of the public reported the animals.
The murders at both locations are suspected to have occurred between 5pm on June 21 and 12pm on June 23.
In Victoria it is illegal to hunt, destroy or injure wildlife, with penalties of more than $9,000 and six months in prison for each offence.
Additional animal cruelty violations can cost offenders more than $98,000 or two years in prison.
Anyone with information about the kangaroo deaths is urged to contact Crime Stoppers.