PUEBLO, Colo. (CBS4) – Seven people were hurt in a steel mill explosion in Pueblo Saturday night. Pueblo firefighters rushed to the site of the Evraz Rocky Mountain Steel Plant on South Fwy Road at around 5:15 p.m.

(credit: Pueblo Firefighters IAFF)

David Light, the Vice President of Operations tells CBS4 water was somehow “introduced” into an electric arc furnace which created a “mild explosion.” The seven victims suffered minor, non-life threatening injuries like bruises and dust inhalation. They were sent to Parkview Medical Center.

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However, the assistant fire chief with the Pueblo Fire Department tells KKTV three people were “critically” injured in the explosion. One of those victims was taken to a burn unit in Denver. They are expected to survive.

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(credit: Pueblo Firefighters IAFF)

Further details about the victims or situation were not released.

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The plant is not operational as the investigation continues, but officials say it is secure.

Danielle Chavira