The umbilical cords of both fetuses were attached to a single placenta, the release stated.
The cause of death has not been determined.
Detectives were asking for the public’s help in identifying the mother, who they described as a woman who was recently pregnant, was no longer pregnant, but does not have her babies.
Anyone with information was asked to call the Homicide Detail at 858-974-2321 or after hours at 858-565-5200.
Those who prefer to remain anonymous may call “Crime Stoppers” at 888-580-8477.
Correction: An earlier version of this article incorrectly described the bodies. The post has since been updated.