Sheriff Jerry Jones said deputies responding to a tip went to a home near Louisburg on Sunday evening and asked to speak to a teenage girl they believed to be the mother. Jones said they left when told the girl was not home.
The sheriff said the girl's father later called the deputies and asked them to return. When they did, they were directed to a shallow grave where the 8½-pound baby girl was found in a bag.
Jones said the state medical examiner's office said the baby had been born healthy. It was not clear how and when she died.
Jones said the teenage girl is hospitalized, and no charges have been filed pending further investigation.