A 15-year-old student injured in the Oxford High School shooting has died, bringing the death toll to 4

• A fourth victim has died following a mass shooting at a Michigan high school, police said.
• Justin Shilling, 17, died at about 10:45 a.m. local time on Wednesday.

A fourth victim has died following a shooting spree at a Michigan high school that left multiple others injured, police confirmed on Wednesday morning.

Justin Shilling, 17, died at around 10:45 a.m. local time on Wednesday, the Oakland County Sheriff's Office said.

Shilling and three others — Tate Myre, 16, Hana St. Juliana, 14, and Madisyn Baldwin, 17 — were killed after a 15-year-old sophomore opened fire at Oxford High School, north of Detroit, on Tuesday.

Six others — and a teacher — were left injured as of Wednesday morning.

Oakland County Undersheriff Mike McCabe told reporters on Tuesday that police responded to an active shooter shortly after 12:50 p.m. local time, and that a suspected shooter was taken into custody within minutes.

Oakland County Sheriff Mike Bouchard said at a press conference Tuesday evening that police had recovered a 9mm Sig Sauer SP 2022 loaded pistol from the suspected shooter, who got the gun after his father purchased it on Black Friday.

McCabe confirmed to Insider that the suspect, whose identity is not yet known, has asked for a lawyer and that any potential motive is currently unclear.

Authorities said they will provide additional updates on the mass shooting at a press conference at 3 p.m. local time Wednesday afternoon.

This story is developing. Please check back for updates.