Monterrey - Civil protection authorities say an explosion inside an asphalt plant in northern Mexico has killed three workers and gravely injured three more.
Director Jorge Camacho Rincon says the blast occurred on Tuesday about 19:00 local time in Abasolo, north of the industrial city of Monterrey.
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Camacho said on Tuesday that the explosion was inside a reactor where asphalt is mixed with rubber. That blast in turn caused an asphalt tank to burst, killing three people standing nearby. While they had not yet determined the cause, Camacho said that the reactor somehow overheated.
The case is now in the hands of state investigators because of the deaths and injuries, Camacho said.