Marysville Pilchuck High School, which is north of Seattle, was placed on lockdown Friday after reports of a shooting.
One of the students in the lockdown told CNN (via phone) that the shooting started in the school's cafeteria. CNN affiliate KIRO-TV reported footage of students running out of the building with their arms in the air.
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Authorities told CNN that they "are confident that there is only one single shooter."
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