Police are investigating two separate cases involving injuries to infants.

A 20-year-old Army man was identified yesterday as a suspect in an attempted-murder investigation concerning critical injuries suffered by a 5-month-old Wahiawa girl Dec. 8. No charges have been filed against the man, who is being held by the Schofield Barracks provost marshal.

The child is at Tripler Medical Center.

A second case being investigated as a second-degree assault involves a 9-month-old Waikiki boy with severe burns. The child is at Kapi'plani Medical Center for Women & Children, police said.