A 17-year-old was arrested on two counts of terroristic threats, which police say were made toward Millard South on Tuesday.
The threat was initially considered unsubstantiated.
The suspect's name was not released.
Stay with 3 News Now for more on this story as it develops.
Correction: The original story stated the suspect arrested was a Millard South student, which was not the case. 3 News Now regrets the error.
