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Pupils of Moscow school number 263 leave the building escorted by policemen on February 3, 2014. An armed student entered a Moscow school on Monday and took more than 20 teenagers hostage in an incident that also claimed the lives of a policeman and a teacher, security officials said. The hostage-taker was one of the students of school number 263 on the northern outskirts of Moscow, police officials said. AFP PHOTO / VASILY MAXIMOVVASILY MAXIMOV/AFP/Getty Images
Pupils of Moscow school number 263 leave the building escorted by policemen on February 3, 2014. An armed student entered a Moscow school on Monday and took more than 20 teenagers hostage in an incident that also claimed the lives of a policeman and a teacher, security officials said. The hostage-taker was one of the students of school number 263 on the northern outskirts of Moscow, police officials said. AFP PHOTO / VASILY MAXIMOVVASILY MAXIMOV/AFP/Getty Images

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    School shooting in Moscow kills 2

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School shooting in Moscow kills 2

A school shooting in Moscow has left 2 people dead, including a teacher. CNN's Phil Black reports.

School shooting in Moscow kills 2

A school shooting in Moscow has left 2 people dead, including a teacher. CNN's Phil Black reports.