FLAGSTAFF, Ariz. (AP) — The top two officials at Grand Canyon National Park are among those facing disciplinary action after a federal probe found that they violated policies on reporting and investigating allegations of sexual harassment in the park's river district.

The National Park Service's Intermountain Region director, Sue Masica, declined Thursday to say what specifics actions would be taken against Superintendent Dave Uberuaga and his deputy, Diane Chalfant. The possibilities could include firing, she said.

A complaint filed in 2014 by 13 former and current Grand Canyon employees prompted an investigation by the Interior Department's Office of Inspector General. The complaint alleged a 15-year pattern of abuse in the river district on rafting trips led by the Park Service.

The investigation found that disciplinary actions were inconsistent when it came to sexual harassment and that the Grand Canyon's chain of command failed to properly investigate or report allegations of misconduct.

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