Multiple injuries were reported on Monday evening after shots were fired at Michigan State University, prompting shelter in place orders amid a search for a suspect, campus police said, according to CNN.

“The suspect is believed to be on foot right now. Community members on and off campus should continue to shelter in place. Police are continuing to respond,” MSU police tweeted.

Police said they believe there is only one suspect at this time.

Police first reported shots fired near Berkey Hall on the East Lansing campus around 8:30 p.m. ET, telling the campus community in a tweet to “Please secure-in-place immediately.”

About an hour later, campus police said there had been “another reported shooting at IM East,” is a campus fitness center about a mile away from Berkey Hall.