BANGOR — A senior investigator with the Maine fire marshal’s office is testifying that someone intentionally set the car fire that burned three murder victims in a 2012 Bangor triple slaying.

WZON-AM reported that investigator Stewart Jacobs told a Bangor courtroom the fire started inside the vehicle and spread rapidly.

The trial of two men charged with killing three people and then setting fire to a car containing the bodies is continuing Monday afternoon.

Randall Daluz of Brockton, Massachusetts, and Nicholas Sexton of Warwick, Rhode Island, are charged with three counts of murder and one count of arson.

Prosecutors say drug dealing played a role in the killings of 26-year-old Daniel Thomas Borders of Hermon; 24-year-old Nicolle Ashley Lugdon of Eddington; and 28-year-old Lucas Alan Tuscano of Bradford.