Police at Michigan State announced that all activities on campus, including athletics, have been canceled for the next 48 hours in the wake of a fatal shooting there Monday night.

Three people were killed and at least five others were wounded after the shooter opened fire shortly before 8:30 p.m. ET, according to university police. Interim Deputy Chief Chris Rozman said several victims suffered life-threatening injuries and that the five were in critical condition at Sparrow Hospital.

"This truly has been a nightmare we're living tonight," Rozman said.

The suspect -- a 43-year-old man whose name was not immediately released but who was not affiliated with the university -- was located outside of Michigan State's campus and died of an apparent self-inflicted gunshot wound, Rozman said in news conferences early Tuesday morning. He added that there was no longer an active threat on campus, leading to the shelter in place to be removed.

Get our free mobile app

"We have no idea why he came to campus to do this tonight. That is part of our ongoing investigation," Rozman said.

The Spartans men's and women's basketball teams were off Monday night, but the men's team was scheduled to host Minnesota on Wednesday at 7 p.m. ET. The Michigan State men's tennis team was scheduled to host Drake on Wednesday at 5 p.m. ET in the only other scheduled home athletic event through the next 48 hours.

The Spartans women's basketball team is scheduled to play at Purdue on Wednesday night, but it wasn't immediately known how that game might be impacted.

Rozman did say that the 48-hour window of cancellations is "subject to change."

30 famous people you might not know were college athletes

Stacker dug deep to find 30 celebrities who were previously college athletes. There are musicians, politicians, actors, writers, and reality TV stars. For some, an athletic career was a real, promising possibility that ultimately faded away due to injury or an alternate calling. Others scrapped their way onto a team and simply played for fun and the love of the sport. Read on to find out if your favorite actor, singer, or politician once sported a university jersey.

More From KSOO-AM / ESPN Sioux Falls