Police in Bartlesville say they're investigating the death of a 4-month old boy as a homicide.

Police Chief Tom Holland says a family member called 911 about 6 a.m. Wednesday to report the child was not breathing. He says the infant was dead when an ambulance arrived.

No names have been released.

Holland says there are indications of trauma to the child's body — but a cause of death has not been released.