A 20-year-old Santa Barbara woman has been arrested on suspicion of attempting to smother her newborn baby two days ago. 

At approximately 8 a.m. Sunday, Santa Barbara police officers and city firefighters along with American Medical Response ambulance personnel were dispatched to an apartment complex in the 1100 block of San Andres Street for a mother who had just given birth to an unresponsive baby, police said Tuesday afternoon.

Roommates discovered both the mother and the baby unresponsive inside the apartment.  

The mother, Joseline Lopez-Hernandez, 20, of Santa Barbara, and the baby were immediately transported to Santa Barbara Cottage Hospital. 

After lifesaving measures were initiated, the baby regained a pulse and began breathing, police said.

As detectives conducted the follow-up investigation, they learned that the mother reportedly attempted to smother the baby, police added.

Lopez-Hernandez was arrested on suspicion of attempted murder and cruel or unusual punishment on a child.

On Tuesday, she was booked into the Santa Barbara County Jail and is being held without bail.