"All I can say is we are investigating it," Dorsey said. "We're taking it very seriously and we're using all resources available to determine the responsible party."

Members of the Auburn Police Division, Auburn Fire Division and Alabama Bureau of Investigation are handling the case.

Students gathered outside Haley Center Tuesday morning after the building was evacuated. Freshman Carson Traff said he believes the university and police division have handled the recent threats to the university "as well as they can."

"It wouldn't be so bad except for the days we've missed," Carson Traff said.

Junior Bonnie Pumphrey said the threats have "completely destroyed" her sense of security.

"I don't feel safe coming to campus," she said. "This is not something to joke about."

Jordan Traff, senior at Auburn, said student reactions range from fear to annoyance.

"I'm trying to email my professor to let her know I can't take the exam," Jordan Traff said.

10:59 a.m. - Auburn Police Chief Paul Register said Haley Center is likely to be reopened "after lunch."