A man whom authorities say killed three people in a crash and stabbing rampage in a Guam tourist district has pleaded not guilty by reason of mental illness.

Spokeswoman Carlina Charfauros (CHAR'-fer-us) of the Guam attorney general's office said 21-year-old Chad Ryan DeSoto entered the plea during a hearing Wednesday local time.

Charfauros says Superior Court Magistrate Judge Alberto Tolentino ordered a psychiatric evaluation to be completed within 10 days. A hearing is set for March 20.

DeSoto is accused of driving onto a sidewalk and striking seven tourists in an upscale shopping area fronting the Outrigger Guam Resort in Tumon Bay. Authorities say he crashed his car into the wall of a convenience store, then got out and started stabbing people.

Three Japanese tourists were killed in the incident.