MacArthur High School in Irving has been cleared by police after going on lock down Wednesday afternoon.
The lockdown was initiated by the principal due to the possible threat of a student with a handgun, according to Irving police. No gun was ever found in the building.
Irving police say no one was hurt. Three juveniles were detained, but later released to their parents.
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Irving ISD set up a reunification site at Travis Middle School. All students at MacArthur High will be taken there via bus, and then released to parents/guardians. Once all students have been taken to Travis MS, bus routes will then begin their normal route.
Any student who drove a car to school, had to find a different way home.
The district states that school will continue as normal on Thursday, but there will be an increased police presence and additional security measures taken at the school.