Pima County Sheriff's deputies are investigating four dogs that were found dead near Valencia and Mark Road.
According to Deputy Ryan Inglett, there is no word on how the dogs died.
One dog was found dead today, the other three were found yesterday.
The case is being handled by the community problems unit. The detective who handles animal crimes will work closely with Pima Animal Care.
Deputy Inglett says he did not know if the dogs had any signs of abuse.
An animal autopsy will be performed on the dogs.
Anyone with information is asked to call 88-CRIME or 911.