The unidentified woman was apprehended in the eastern Paris suburb of Saint-Mande after a public appeal for her whereabouts following the November 20th discovery of the body of the girl on a Normandy beach.

The suspect was refusing to talk to police, but DNA tests showed her parental link to the toddler, regional assistant prosecutor Nathalie Bagny told AFP.

Surveillance video images had shown the woman and the child taking a train from Paris to the Normandy coastal town of Berck-sur-Mer on November 19, then the woman returning alone the next day, some hours after the girl’s body was discovered.

Dozens of people were to hold a “white” march on Saturday in homage of the dead girl, believed to be around one year old and whose identity has not been made public, according to local officials.