A suspicious substance has been found in the cab of one of the two trucks which collided near Hamilton yesterday, leaving both drivers dead.
Police would not say what they thought the substance was or what role it may have played in the crash but speculation was that it could be an illegal drug.
The crash, on State Highway 26 at Newstead about 7.30am, killed 61-year-old truck driver Hugh Leonard Ferguson, and left an 18-year-old passenger with a broken leg. The other driver, the sole occupant of a white truck who is yet to be named by police, also died.
The sound of the impact brought Quality Road Construction director Bryan Atkinson to the road. "It was bloody loud. I was inside my office and heard this boom; it sounded like a bomb going off," Atkinson said.
A bus driver had stopped to help Ferguson, whose passenger limped out of the carnage with just a broken leg, he said.