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Police said the three slain students were a 16-year-old boy, and two girls, 14 and 17. Two of the other victims were in surgery Tuesday evening, and the other six were at hospitals in stable condition. The incident unfolded in about five minutes and police said the shooter, who was not injured, was arrested, turning himself over to officers.
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Michael McCabe, the Oakland County undersheriff, said it appeared the suspect worked alone and investigators are interviewing students and scouring social media for clues to a motive. It's unclear whether there were warning signs.
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It was unclear whether the suspect had targeted anyone. Some parents later said even before the shooting rumors had been circulating that a school shooting was going to happen, and some students even said that they had decided not to attend.