A 15-year-old has killed three fellow students and injured eight others, including a teacher, in a high school shooting in the US state of Michigan.
The victims have been named as Tate Myre, 16, Madisyn Baldwin, 17, and Hana St Juliana, 14. Officials say they do not know whether they were targeted.
Police allege the suspect, a pupil at the school, used a handgun that his father had bought on Friday.
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