State police in Alaska say serial killer Israel Keyes slit his wrist and strangled himself.
Keyes, 34, was found dead in his prison cell Sunday.
Investigators say Keyes used a blade from a disposable shaving razor imbedded in a pencil to cut his left wrist. He also used bedding material from his cell to strangle himself. It's not yet clear which injury was the cause of death.
They say it happened while Keyes was alone in his cell at the Anchorage Correctional Complex sometime between 9:30 p.m. Saturday and 5:57 a.m. Sunday. There's no indication anyone else was involved in the suicide.
Blood soaked, crumpled papers with writing on them were found in Keyes' cell. They were turned over to the FBI for testing.
Keyes confessed to police that he kidnapped and killed Bill and Lorraine Currier of Essex last year. He's suspected of killing at least eight people across the country over the last decade. He was awaiting trail in the murder of Samantha Koenig, 18. Police say he abducted Koenig from the Anchorage coffee stand where she worked, sexually assaulted her and killed her.