A 32-year-old woman and a 30-year-old man were remanded on Sunday on the suspicion of aggravated animal cruelty.
It is believed that they killed two dogs, one of which was a 10-week-old American Staffordshire Terrier, which was found dead and dismembered after the pair initially had reported it stolen.
The puppy’s body was discovered in the middle of June in Tumba, south of Stockholm.
The dog owners are also believed to have been responsible for the death of a 6-month-old dog of the same breed, which was found dead in May in a wooded area of Skärholmen.
“It had very severe internal injuries and had been subjected to very heavy violence,” said prosecutor Jakob Holmberg to the Dagens Nyheter newspaper.
The two are also suspected of fraud after attempting to claim an insurance payout for one of the dogs from their insurance company.
The man and woman are also suspected of aggravated drug offences.
Police have launched an investigation, and are keen to get in contact with witnesses, as well as the breeder responsible for selling the puppies to the pair.