A 20-year-old young man and his 18-year-old companion were in police custody this Friday at the Bayonne police station.
The couple are suspected of homicide of their eight-week-old baby, local media report.
The infant, born on November 16, was taken overnight from Wednesday to Thursday at the CHU Pellegrin in Bordeaux, where he died.
Her state of health had justified this transfer from the home of the parents, who reside with the mother of the young woman in Hendaye, specifies France Bleu.
Suspicious injuries
According to local radio, the results of the autopsy and the injuries found suggest that the baby was the victim of abuse.
Additional examinations have been requested, indicates Sud Ouest.
An investigation was opened for homicide and was entrusted to the judicial police of Bayonne.