Investigators were probing the charred wreckage of four cars and an RV engulfed in flames early Monday morning in Salt Lake City. Salt Lake Fire Department spokesman Jasen Asay said the fire began in a parked car near 1600 S. Major St. (about 50 East) about 3 a.m. It appeared human-caused, but investigators had not determined if it was accidental or intentional. âThe fire originated in a vehicle parked on the street, then spread to the RV that was parked next to it as well as three additional v... <iframe src="http://www.sltrib.com/csp/mediapool/sites/sltrib/pages/garss.csp" height="1" width="1" > </frame>