STARKVILLE, Miss. - Authorities at Mississippi State University said no gun was found and no shots fired after a man's arrest in connection with a "credible threat" the university said it received about an active shooter on campus.

Police said during an afternoon press conference that Phu-Qui Cong "Bill" Nguyen, a freshman studying computer science at the university, was arrested after the university reported the threat.

Warren Strain, a spokesman for the Mississippi Department of Public Safety, says Nguyen was on the phone with an Army recruiter in the Jackson area when the recruiter became concerned about Nguyen and directed a co-worker to call MSU.

MSU Communications Director Sid Salter said that prompted the university to activate their emergency alert system. The campus-wide alert told people to seek shelter and stay indoors. About 30 minutes later the school sent out the all clear, saying a suspect was in custody.

The school said nobody was injured, and no shots were reported fired.

Authorities said Nguyen will face misdemeanor disorderly conduct charges and has been referred for a mental and psychological evaluation.