Authorities say a 17-year-old teenager was charged with aggravated rape and first-degree murder of an 8-month-old child.

The Jefferson Parish Sheriff's Office says Arnold T. Ross was taken into custody Saturday. No bond was set.

Ross was arrested after officers responded to a call of an unresponsive infant near Gretna.

The infant, Da-Von Lonzo, was taken to a hospital where he was pronounced dead shortly after arrival, according to a news release issued by the sheriff's office.

Authorities say Ross told them he was the boyfriend of the infant's mother and the baby fell down the stairs while he was baby-sitting.

Authorities say Ross later acknowledged that he beat the infant repeatedly when he would not stop crying.