A Dimond High school student was arrested Wednesday after making a threat to "shoot up" the school, authorities say. 

Police say the male student became unruly on a school bus Tuesday afternoon and began making troubling threats.

"The student became agitated and threatened to shoot up the school the next day as he was exiting the school bus," APD wrote in a statement. 

The school bus driver made a report with Anchorage School District officials who then contacted APD about the threat. 

"Officers with the Patrol Division interviewed the student and his parents last night. Officers determined there was no active threat to the school," police said.

Following the second interview, the student was arrested and charges were forwarded to the Department of Juvenile Justice. 

"Officers determined there was never an imminent threat to the school, however, the threat itself warranted charges," police wrote. 

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