The man, who was wearing an orange shirt and camouflage pants, was cuffed and brought into custody around 2:30 p.m., according to the school’s Twitter feed. No shots were fired, and no injuries were reported.
State police officers found the suspect, who has not been identified, inside a dorm room in James Hall, according to the Hartford Courant.
Central Connecticut State University officials told everyone there to get indoors and seek shelter around noon Monday, university spokesman Mark McLaughlin said.
New Britain Mayor Tim O’Brien told reporters nearly two hours after the university instructed people on campus to seek shelter.
“Campus emergency. Seek shelter. Lock doors, close windows. We will communicate when we have more info. This is not a drill,” CCSU said on Twitter.
A message on the school’s website instructed readers not only to get inside buildings, but to stay away from windows.
The school is in New Britain, about 7 miles southwest of Hartford.
CNN contributed to this report.