Washington state officials are releasing statements about the Wednesday shooting at Freeman High School.
Three other juveniles are in stable condition at a hospital.
Their injuries are not known.
A suspect was taken into custody, The Review said.
The school, which is between Spokane and Rockford, has 327 students, according to media reports.
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Spokane Public Schools, the Central Valley School District and the Mead District were all on lockdown.
Schaeffer said the "threat from the shooter has been eliminated".
Freeman High is located south of Spokane in eastern Washington state.
Cheryl Moser said her son, a freshman at Freeman High School, called her from a classroom after hearing shots fired.
The high school has been cleared; some students have been evacuated to the Freeman Elementary School nearby. The Spokane Sheriff's Office is expected to provide more information at a news conference sometime on Wednesday afternoon.
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Ambulances and a Lifeflight helicopter were sent to the school. After an hour, the school tweeted that the lockdown had been lifted.
An automated warning that was reportedly repeating on law enforcement radio channels said, "Freeman High School".
Classes were about to begin because it's a "late start" day, Baxter said.
PBS NewsHour will update this story as it develops.
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