Two young adults were killed and three other people were seriously injured in a Cajon pass dump truck accident. According to reports coming from the truck accident scene the dump truck lost control trying to exit the Southbound 138 exit from Interstate 15 near when its braked failed causing it travel into oncoming auto traffic hitting the victims PT cruiser and eventually leaving the roadway and landing on top of the PT cruiser. San Bernardino County authorities are still investigating this fatal truck accident. Our condolences go out to all the victims families of this horrible truck accident.