ANCHORAGE, Alaska – A man who confessed to killing an Alaska barista and multiple other people across the country died in his jail cell after slashing one of his wrists and using bedding material to strangle himself, Alaska State Troopers said Wednesday as tips came in on other possible victims.

The state medical examiner hasn't determined which of those injuries was the primary cause of Israel Keyes' death.

Keyes, who was found dead in his Anchorage cell Sunday morning, had cut his left wrist with a blade from a disposable razor that was imbedded in a pencil. He also used a rolled-up sheet to strangle himself, troopers spokeswoman Beth Ipsen said.