CLAYTON, Mo. (AP) — A Missouri mother who said her infant twins were stillborn has been charged with killing the children.

The St. Louis County Prosecuting Attorney’s office says 25-year-old Maya Caston of St. Louis faces two counts of second-degree murder and two counts of child abuse. No attorney is listed for her in online court records.

Authorities say she gave birth to the boy and girl then covered their mouths and noses with a towel. She reported their births on Wednesday. Officials say the children were carried to full term and neither was stillborn.