(OXFORD TOWNSHIP, Mich.) — A 15-year-old sophomore opened fire at his Michigan high school on Tuesday, killing three students and wounding six other people, including a teacher, authorities said. Oakland County Undersheriff Mike McCabe said at a news conference that he didn’t know what the assailant’s motives were for the attack at Oxford High School in Oxford Township, a community of about 22,000 people roughly 30 miles (48 kilometers) north of Detroit. Read more: The School Shooting Generation Has Had Enough Officers responded at around 12:55 p.m.