Firestone High School had a short lockdown Friday morning, after tips led to the discovery of marijuana at the school.

Two Firestone girls were found possessing a small amount of marijuana.

APS spokesman Mark Williamson tells WAKR.net that a third student, a boy, was found with drug paraphenalia in his locker. They say that discovery was not related to the other drugs found.

School resource officers took about 25 minutes to search for the drugs, and all three students were suspended.

Williamson says classes were not affected during what the district calls a "safe school watch".