The baby was found just before noon at the MRF recycling plant on the 17000 block of Abbey Lane. An employee sorting through recyclables made the discovery and called 911.
Detectives say an autopsy will be done on the baby, but at this point, it's too early to tell whether the baby was the victim of a homicide or if the baby was a stillborn. Officials say the female victim appears to be a newborn.
"The sheriff's department is asking that the public, anyone who has information of a female may have recently given birth and who does not have their baby in their custody, that they would please call sheriff's homicide," said Jodi Miller with the San Bernardino County Sheriff's Department.
Anyone with information was asked to call authorities at (909) 387-3589.