Threats of violence on college campuses are not to be taken lightly, and Michigan authorities are reacting accordingly.

The University of Michigan Police Department is investigating a string of disturbing tweets from former Wolverines linebacker Elysee Mbem-Bosse that appeared to include threats against head coach Jim Harbaugh.

The investigation started after a Reddit user posted screenshots of several profane tweets from Mbem-Bosse’s account Monday night. Mbem-Bosse seemingly was upset he had been suspended last season after leaving the team to attend to a “family crisis.”

“Within hours of my family crisis,” Mbem-Bosse wrote in one since-deleted tweet. “F— YOU. GN. It’s on tomorrow.”

He tagged Harbaugh in another tweet, then made a direct violent threat.

“Michigan is open carry. Let’s not forget. Not your friend,” Mbem-Bosse wrote. “They sent someone to my crib before. I was nice enough to call the cops next time I’m calling the morgue. I’m talking with facts”

The ex-linebacker also tweeted “Dead and alive.” and “Let’s not have a murder case On your hands.”

Mbem-Bosse later deleted his series of tweets and made his Twitter account — which isn’t verified — private.

The Georgia native, who came in with Michigan’s 2016 recruiting class, left the team last November and no longer is part of the football program, Michigan’s athletic department said in a statement Tuesday.

Mbem-Bosse still is enrolled at Michigan, according to athletic director Warde Manuel, who added Harbaugh is “aware” of the threats.

Thumbnail photo via Kim Klement/USA TODAY Sports Images