The decision was made at the end of the investigation into charges against the pair. As part of that investigation, police also allegedly found a revolver in the apartment where the baby was found.
Sources indicated that the woman's partner was released since it was determined that the detainees deceived him into believing that the woman was pregnant. The woman apparently underwent a series of medical check-ups to fool people into thinking she was pregnant.
The detainees are being held at the Department of Judicial Investigation. In the course of the week they will be moved to a prison.
On the other hand, the baby has been returned to family members and is reportedly in good health.
The baby was kidnapped from the maternity ward Sunday morning. The infant was found 14 hours later in an apartment in Río Abajo with the suspects.