A terrier has drowned after being tied to a weighted rucksack and hurled into a canal in Lancashire.
The dog, called Freddie, was discovered floating in the water under a bridge in Burnley Road in Accrington on 2 August.
The 18-month-old had been micro-chipped which led the RSPCA to its owners who are said to be devastated by the discovery.
RSPCA inspector Mandi Barr said: "This poor little dog never stood a chance."
A member of the public spotted the dog's body and called Lancashire Police.
Ms Barr added: "They had put him outside in the garden at around 0700 BST that morning. Naturally they are very upset about this.
"Two carrier bags, tied together, had been used to attach a rock-stuffed rucksack to him. Whoever did this is a callous and cruel coward and we want to know who they are.
"We don't want them to get away with this. This dog has suffered an awful death and someone is responsible for that. Please, if you think you can help, call us."
The rough-haired terrier was black, with a white stomach and tan patches on its face and legs. The rucksack it was tied to was purple with black straps and a red 'Head' logo on it.