MINNEAPOLIS (WCCO) — Five people have been arrested in connection to a shooting that killed a University of Minnesota Duluth student.

William Grahek, 22, was killed on Feb. 14 at a home in Duluth’s East Hillside neighborhood.

William Grahek (credit: The Grahek Family)

William Grahek (credit: The Grahek Family)

Four people were arrested Friday, while a fifth suspect was already in the St. Louis County Jail on unrelated charges.

The suspects range in age from 18 to 26 years old.

Police are seeking charges of second-degree murder against three of them.

Formal charges are expected on Tuesday.