Bismarck police say they are still trying to locate the person believed to have made a threat to Bismarck State College, prompting the school to go on lockdown.

The school canceled its remaining Thursday afternoon and night classes as officers continue investigating.

College President Larry Skogen says officials received a report that a student had threatened to shoot up the library with a machine gun and that the FBI called it a "credible threat." The school went on lockdown just before 11:30 a.m. Thursday.

Officials are asking that no one come to campus until an "all clear" is issued. The school has nearly 4,100 students and is the third-largest college in the state university system.

Police say no one has been injured and everyone is safe at this time.