The suspect, identified by police as Anthony McRae, entered two buildings on campus, turning both into shooting galleries as students ran for cover and heavily armed police officers stormed the area looking for the assailant.

Hours later, law enforcement caught up with McRae, who died from a self-inflicted gunshot wound, cops said. During the manhunt, police released surveillance images of McRae walking inside a building while gripping an unknown object in one hand. Police later recovered a weapon.

MSU Interim Deputy Chief Chris Rozman discussed the attack at a news conference ... "I can’t even begin to imagine what that motive would be. That will obviously be part of our investigation."

Rozman added, "we are unsure of any affiliation that the suspect had to the University."

The deadly assault marked the 67th mass shooting in the country so far this year. A mass shooting is defined as 4 or more people killed or wounded in a single violent incident, not including the gunman.

Rozman said police first started receiving 911 calls of a shooting at Berkey Hall around 8:18 PM ET. When cops arrived at the building, they found two students dead.

Soon after, Rozman said, officers responded to another shooting at the nearby student union building, where they discovered the third student deceased.

Rozman confirmed that 5 other victims were listed in critical condition at a local hospital.

Michigan Governor Gretchen Whitmer described the MSU community as "reeling" from the shooting. She also said, "We mourn the loss of beautiful souls today, and pray for those who are continuing to fight for their lives."