According to officials, a teacher reported seeing three individuals who she didn't recognize carrying what she thought to be knives in the building around 1:00 p.m.
She reported it and officials placed the school on lockdown.
Dozens of anxious parents showed up at the school as seen in photos shared via Twitter.
Parents anxiously waiting at Edward Murrow HS for Dismissal after Lockdown No Injuries pic.twitter.com/alcCC0t3xZ— Boo Boo Reports (@askbooboo) January 21, 2015
Police and school officials investigated and it turned out to be 3 students who were going to shop class with cutting instruments that they were instructed to bring with them.
The lockdown was lifted around 2:30 p.m.