The RSPCA are appealing for assistance after a pet cat was found with cable ties around its body and a threatening note attached around its neck.
The incident happened in north-east Melbourne, with the owner telling the RSPCA that the ties were bound very tightly around the neck, tail and legs of the cat.
It had also been sprayed with an odourless green substance by the attacker.
The RSPCA is appealing for anyone with information about the attack to come forward and assist with inquiries.
It is understood that the cat was let outside on the morning of September 30, on the corner of Main Road and Reynolds Road in the suburb of Research.
The cat is then understood to have returned two hours later with the ties and a green substance on its body.
"Unfortunately, we do receive regular reports of abuse to cats that have wandered away from home," RSPCA Victoria Inspector Karen Collier said.
"They are often subject to cruelty such as illegal traps, being locked in sheds or under houses and being shot with rifles or bows.
"We are appealing to members of the public to come forward with any information that could assist with our investigation or help us find the person or persons responsible."
Anyone with information is urged to contact the RSPCA Victoria on 9224 2222 or at rspcavic.org.