COLORADO SPRINGS, Colo. (AP) — The fire department that first responded to a massive wildfire that killed two people in the Black Forest area says outside investigators have developed some leads about the potential source the blaze.

Black Forest Fire/Rescue District announced the development Wednesday night but provided no details.

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The fire started in June northeast of Colorado Springs and destroyed 486 houses.

Black Forest Fire/Rescue says the leads emerged during a review of the response to the fire, conducted by two investigators hired by the agency.

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El Paso County Sheriff Terry Maketa, whose department is also investigating the fire, has criticized Black Forest Fire/Rescue Chief Bob Harvey’s handling of the blaze.

Maketa’s spokesman didn’t immediately respond to an after-hours call seeking comment.

The sheriff has said the fire’s cause is still under investigation.

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