LITTLETON, Colo. (CBS4) – The students, teachers and staff at Columbine High School shared a message with the students, teachers at staff at STEM School Highlands Ranch. A shooting erupted at STEM on Tuesday afternoon.

Marquees outside of Columbine read “Our hearts are with you STEM.”

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Columbine High School just commemorated the 20th anniversary of the Columbine shooting on April 20.