Video:Grandmother uses circular saw 'to kill nine-month-old baby girl because she wouldn't stop crying'

A 9-month-old girl is dead after a relative sliced her throat with a power saw when she wouldn't stop crying, according to Chicago police.

Officers found the child, identified by family members as Rosie, after being called Monday morning to a building on the city's West Side.

A police official confirmed media reports that a 52-year-old relative used a circular saw to cut the baby's throat to stop the infant from crying.

Speaking on condition of anonymity, the official said the woman is in police custody at a hospital with self-inflicted wounds.

Police said both the baby and the woman were found by another relative.

Illinois Department of Children and Family Services officials said the agency had no prior contact with the family. Authorities said no other children were present in the home at the time of the incident.

Ben Llamas works with the child's father and drove him to the scene. Llamas told the Chicago Tribune the father was upset but did not talk about what happened.

His friend had moved in to that house about a year ago with a woman, Llamas said. Together the couple had a young child.

‘At first, he was reluctant, but when the baby came, he fell in love,’ Llamas said. 

‘He shows us pictures of that baby every day.’

Neighbors said several people live in the home where the baby was found.

‘They were really good people,’ Francisco Arreola told the Chicago Tribune in Spanish. ‘I would always see them and they were very happy. I never heard them fight or anything.’

Police were called at around 9.40am to a multi-family home in the 2800 block of South Avers Avenue in the Little Village section of Chicago, where they discovered the lifeless body of the infant with 'visible trauma.'

The child was pronounced dead at the scene. Sources have identified the little girl as Rosie Herrera and told ABC 7 Chicago the 52-year-old woman who allegedly cut her throat may have been her grandmother.

Investigators said before the suspect took a circular saw to the child's body, she tried to quiet her down by stuffing something down her throat.

Following the grisly killing, the 52-year-old reportedly attempted to take her own life. She was rushed to Mount Sinai Hospital in stable condition.

Ben Llamas, a friend of the girl's father, said the 23-year-old man 'adored her.

'Stunned neighbors said the couple who lived at the home on Avers Avenue has two grown daughters, each of whom had a baby recently. They have been described as a nice and quiet family.