The Clark County School District sent a letter to parents Tuesday afternoon saying an active shooter investigation is underway and asking that people stay away from the high school.
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North Las Vegas police said the shooting happened on the northwest corner of the Canyon Springs High School campus just outside the baseball field.
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The 18-year-old male was found shot on the outer perimeter of the campus and was later pronounced dead at the hospital.
Police are still working to confirm if he was a student at the school, acting North Las Vegas Police Chief Justin Roberts said.
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Roberts said it appears the victim was specifically targeted and this was not a random school shooting.
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The school, which has about 2,700 students, had already let out for the day, but a magnet program with about 500 students was still operating when the lockdown was ordered, Roberts said.
Officers searched the campus for a suspect and other potential victims, but found none.
Police lifted the lockdown later in the afternoon.
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"We don't right now believe there's any threat to the school or the students," Roberts said.
No weapon was recovered on the scene. No description of a possible suspect was immediately available.
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