(credit CBS)

(credit CBS)

DENVER (CBS4) – A massive blaze broke out Friday evening off Colorado Avenue and Alcott Street.

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The water crews put on the fire actually may have fueled the fire. Investigators are looking to see whether magnesium was in the garage.

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Magnesium makes it harder to put out a fire and pouring water on it actually makes the flames more intense. It’s found in used in auto parts.

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Firefighters were still working to put out the flames after 6:30 p.m.