An Ohio medical examiner says an infant whom authorities suspect was killed by an 11-year-old girl died of blunt impact injuries to the head, neck, body and extremities.

Two-month-old Zuri Whitehead was staying overnight with a friend of her mother's and the friend's 11-year-old daughter in the Cleveland suburb of Wickliffe when the friend called 911 early Friday to report that the child was unconscious. Zuri died in surgery later that morning.

The medical examiner ruled the death a homicide.

The 11-year-old has been charged with murder and is being held in a juvenile detention center where she awaits a competency evaluation. Her public defender declined to comment Wednesday. The cause of death was released Wednesday by the Cuyahoga (ky-uh-HOH'-guh) County medical examiner.