One of the divers, Henric Sandqvist, has been diving for 20 years and he says that it is not unusual to find kittens that have drowned.

- Bags with stone in them usually mean kittens or some other animal.

It sounds awful, but unfortunately you get used to it, he says to Smålandsposten.

Can give two years in prison

According to the Animal Welfare Act, anyone who causes unnecessary suffering to kittens when they are killed can be punished with a fine or imprisonment for up to two years.

- If you come across someone drowning their kittens, you should immediately make a police report of animal cruelty, says Wilhelmina Ehrenkrona, animal welfare officer at the county administrative board in Kronoberg, to the newspaper.