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DENVER — Most major school districts in metro Denver have canceled classes Wednesday amid what the FBI called a credible threat to schools in the area.

Included in the closures are Denver Public Schools, Adams 12 Five Star, Aurora Public Schools, Boulder Valley School District, Cherry Creek School District, Douglas County School District, Jefferson County Public Schools, Littleton Public Schools and Westminster Public Schools.

RELATED: School closures in Denver metro area

In a letter from Denver Public Schools, district spokesman Will Jones said superintendents from across the metro area discussed the threat and collectively decided to cancel classes Wednesday.

“The decision was based on information provided by law enforcement and analysis provided by threat assessment experts,” Jones said.

Based on the fact that the FBI have identified a person who represents a credible threat and her whereabouts are unknown at this time, the districts agreed that it was best to exercise extreme caution and close schools for the day.”

According to the FBI, Sol Pais is the woman wanted in the case.

She is believed to be infatuated with the Columbine massacre and purchased a shotgun and ammunition in the Denver area after arriving at Denver International Airport on Monday night.