Rats chewed a four-month-old baby to death after her 18-year-old mother left her at home to go to a party.
The little girl's face and fingers were mauled by the rodents as she lay in her crib at home in Acolman, Mexico, on Monday night.
It was not until the teenage mother, returned home after midnight that she discovered the child bloodied and lifeless in her crib.
First responders pronounced the baby dead at the scene.
Lizbeth and her mother, who was babysitting the child, were arrested on suspicion of neglect, according to local site Siete24.
According to foreign media reports, who gathered round the family's home on Tuesday, Lizbeth was a single mother.
Charges against the mother have yet to be announced pending the results of an autopsy on her daughter's body.