Sophia Lada

The violence in the city of Rochester Hills, which injured nine people including children, comes three years after the shooting at Oxford High School in the same county.

A freelance journalist who is a recent graduate of the university reported on the mass shooting on campus while her younger sister, a current student, sheltered in a classroom.

Three students were killed late Monday, and five others remain in critical condition. The gunman, who killed himself, had been previously arrested on a weapons charge and was carrying a note threatening schools in New Jersey.

The school police said shots were fired near Berkey Hall, home to the school’s college of arts and sciences. The shooter was still at large, police said.

The police said the gunman died of a self-inflicted wound and was found off campus. Three people were killed and five were taken to the hospital with injuries after multiple shootings across the campus on Monday.