A mother is facing charges in the case of a newborn baby left unattended earlier this week at a New York City subway station. 

Police said 30-year-old Assa Diawara, of Queens, was charged early Wednesday morning with abandonment of a child and endangering the welfare of a child. 

Investigators say they were able to follow her movements on surveillance video, leading to a residence and eventually finding her on the street. 

Baby found during morning rush at Penn Station

The NYPD said the newborn was found unattended during the morning rush Monday at Penn Station in Manhattan. She was wrapped in a sheet on the steps leading down to the southbound 1, 2 and 3 trains. 

Police said the baby did not appear to have any injuries. She was taken to the hospital and is expected to be OK. 

Investigators later said her umbilical cord was still attached, but they had not found any evidence indicating that she was born on a train or in the station. 

Police released surveillance images of a person wanted for questioning in the case Tuesday morning. The person appeared to be carrying a bundle of sheets or blankets in their arms. 

There was also another scare Tuesday morning when a baby boy was found unattended at a Dunkin' in the Bronx. Police said the child's mother returned about 20 minutes later and was not charged with any crime. 

Under New York state law, it is a felony to abandon a child under the age of 14. New York State's Abandoned Infant Protection Act allows a parent to abandon a newborn baby up to 30 days of age anonymously, if the child is left in a "safe haven," like a fire station, police station or hospital, and in a safe manner.