(East Lansing, MI) - Authorities have identified the gunman in a mass shooting last night at Michigan State University.

43-year-old Anthony McRae shot himself to death when confronted by police miles away from the campus.

Right now, authorities are trying to determine a motive. The gunman was not a student or employee. He also had no affiliation with the university, officials said. 

Three people were killed and five others critically wounded in the shootings, police said. 

Last year, reports indicate there were more than 600 shootings where at least four people died or were injured in the U.S.