Miami-Dade police spokesman Alvaro Zabaleta said two people were pronounced dead at the scene. Miami-Dade Fire Rescue officials said two others suffered traumatic injuries and were taken to a hospital, while a third was treated at the scene.

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Fire officials said it took about 90 minutes to extinguish the flames and that the cause is under investigation.

A truck-cleaning company and welding shops are listed as operating at the address of the explosion.

Medley, located about 12 miles northwest of downtown Miami, is mostly industrial and commercial complexes.