The Department of Fire and Emergency Services said on Monday that it would take five days to retrace the road train's route. Authorities suspect vibrations from the road train caused the screws and a bolt from the gauge to come loose, and then the capsule fell out. A member of the Incident Management Team coordinates the search for a radioactive capsule that was lost in transit by a contractor hired by Rio Tinto, at the Emergency Services Complex in Cockburn, Australia, in this undated handout photo. Department of Fire and Emergency Services/Handout via REUTERSCenturion said in a statement that the capsule was dislodged from equipment contained in a crate. "The equipment can detect radiation emitted by the missing capsule and is currently being used around the Perth metropolitan area and outskirts."

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