Police in the US state of Michigan say a gunman who opened fire at a university campus has killed at least three people.

Authorities said the 43-year-old man opened fire at Michigan State University on Monday night, and that he also wounded five people who are being treated at a local hospital.

Police said the suspect was later found dead at a location off campus. They said he had fled after firing his gun at two places on campus.

They said the suspect may have killed himself.