At least one person is believed to have been killed after a shooting at Michigan State University – with a search under way for a lone gunman in a mask.
Campus police said multiple injuries had been reported and described the suspect as “a short male with a mask, possibly Black”.
He is believed to be on foot.
A spokeswoman for Michigan State University confirmed to The Detroit News there had been one fatality.
“There have been shots fired near Berkey Hall on the East Lansing campus. Please secure-in-place immediately. Police are active on scene,” said a tweet at 8.40am.
Police later said there had been “another reported shooting” and that there were “multiple reported injuries”.
Berkey Hall is an academic building, while the other shots are believed to have been fired at an athletic facility called IM East.
Victims are being taken to Sparrow Hospital.
Large numbers are likely to be locked down as about 50,000 people attend the East Lansing campus – which also hosts evening classes.
A number of buildings have already been secured as police systematically search for the gunman.
Lisa McClain, US representative for Michigan, tweeted: “There are reports of an active shooting on campus at Michigan State University.
“If you are there, police instructions are to Run, Hide, Fight. I am praying for all Spartans right now.”
Michigan Governor Gretchen Whitmer said on Twitter that state police, university police and local officers were at the scene.