Authorities have not yet disclosed the condition of the officers, nor whether any civilians were injured. A SWAT team and bomb squad truck are reportedly on the scene.
A reporter for a local Denver news outlet said she heard gunfire as she arrived at the scene. Authorities are asking people to avoid the area.
A representative for the apartment building, Copper Canyon Apartments, did not immediately respond to request for comment.
This is a developing story. Please check back for updates.
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