A shooter opened fire at a high school in Oxford, Michigan, and according to initial findings, killed at least three students.
Six other people - including a teacher - were shot wounded in the incident on Tuesday, the Oakland sheriff's office said.
The alleged perpetrator is a 15-year-old tenth grader from Oxford High School north of the metropolis of Detroit.
He was arrested.
The police had confiscated a handgun.
The suspect asked for a lawyer and did not comment on any motive for the crime.
A police spokesman said it was "a very tragic situation".
The suspect was caught within five minutes of the first emergency call, which was received at 12:51 p.m. (local time / 6:51 p.m. CET).
He did not offer any resistance.
Fatal incidents continue to occur in the United States because shooters open fire in schools.
Firearms are relatively easy to come by in the United States.