A Cook County judge has ordered a Chicago woman charged with first-degree murder in the slaying of her 7-month-old granddaughter to be held without bail.

The order by Judge Maria Kuriakos-Ciesil on Wednesday came after prosecutors in court alleged that Manuela Rodriguez stuffed a sock into Rosie Herrera's throat to get her to stop crying and then, when the baby continued to cry, she hit her in the head with a pipe wrench.

They alleged the 52-year-old Rodriguez told police that she killed her granddaughter and admitted to cutting the infant's neck, chest and shoulder with a power saw. An autopsy revealed those injuries were inflicted after the girl was dead.

Police say Rodriguez later tried to take her own life with the saw.