Two infants were among the 24 people killed by the tornado that ripped across the Oklahoma City area this week, the Oklahoma medical examiner's office said Wednesday.

The office said it has identified 23 of the 24 victims and that 10 of them were children, including seven who were killed at the Plaza Towers Elementary School.

All the children have been identified, including 4-month-old Case Futrell and 7-month-old Sydnee Vargyas, who both died from head injuries.

"The ME staff worked throughout the night and yesterday in coordination with state and federal agencies to identify victims and document injuries," medical examiner's spokesman Amy Elliott said in a statement.

The eight other children ranged in age from 4 years old to 9 years old. Of those, six suffocated and two died from massive injuries.

Elliott said the agency still is trying to determine the ages of five of the victims. Of the adult victims, eight were women and six were men.

Officials still are trying to contact the relatives of eight of the victims, she said.