Police said two adults and a child were found dead in an apartment in Sierra Vista and it could have been a murder and a suicide.
Sierra Vista police officials said the three bodies were found after officers responded to suspicious circumstances at noon.
They said Gerardo de la Torre, 47, Raquel de la Santos de la Torre, 30, and a five-month-old baby died at the scene, and each was hit by one shot.
It was not immediately clear whether the man and the woman were married or otherwise related, and the name of the infant was not revealed yet.
Police said no suspects have been searched for in the case and no further information will be released until the autopsies are completed.