A Valparaiso University student was arrested after he allegedly called and told police Tuesday evening that he had taken hostages and was armed with a gun at the library on the university’s campus in Indiana, causing officials to conduct an evacuation and order students and others to seek shelter.

Police cars from several agencies, an ambulance, a SWAT vehicle and Porter County's mobile command unit swarmed outside the Christopher Center for Library and Information Services on the university's campus after the Porter County Sheriff's Department received a call around 7:35 p.m. about a potential hostage there, said Nicole Niemi, director of media relations.

Local law enforcement agencies, including the Valparaiso Police Department, Indiana State Police and the sheriff's department, were dispatched to the campus, and the library was sealed to prevent access, Niemi said.

But officials found no evidence of a gunman or any shooting victims, and a campus-wide "shelter in place" order was lifted around 11 p.m.

Early Wednesday, officials announced that Michael Clemens, 20, of Chesterton, Ind., was arrested in connection with the incident after police found him in Gellersen Hall on campus, according to a news release from the Valparaiso Police Department.

Clemens, who is a student at the university, “admitted to making the phone call” during an interview with police, the release said.

He was charged with a felony count of intimidation and a felony count of false reporting causing an evacuation. He was held at the Porter County Jail, according to the release.

The Christopher Center was scheduled to reopen Wednesday, and all classes, practices, events and other campus activities will occur as scheduled, according to officials.

A Valparaiso University student was arrested after he allegedly called and told police Tuesday evening that he had taken hostages and was armed with a gun. (WNDU - South Bend, IN) A Valparaiso University student was arrested after he allegedly called and told police Tuesday evening that he had taken hostages and was armed with a gun. (WNDU - South Bend, IN) SEE MORE VIDEOS

Tuesday evening, students occasionally milled past the scene, where police ushered them back. For a time, a large group of students lined the edge of a parking lot across the green from the library.

Lauren Tehan, a freshman from Valparaiso, said she was walking back to the library around 7:30 p.m. after eating at Harre Union and was turned away.

"They were evacuating it," she said.

Amy Lavalley is a freelance reporter.