The Thomas A. Edison Middle Learning Center in Dallas was placed on lockdown Friday morning after two youths ran from a security search.
Sources tell NBC 5 that the lockdown was put into place after a current student and a former student ran from the building with a backpack.
School officials were searching the backpack belonging to one of the youths when one of the children suddenly grabbed the bag and ran away. Officials said the school has a policy that all backpacks must be clear or transparent and that the backpack in question was not in compliance.
The school prinicipal and an officer with the Dallas Independent School District police chased the pair and alerted ofters to the situation on the radio. The alert prompted the lockdown.
The Dallas Police Department assisted in the search with both an officer on the ground and with their helicopter. NBC 5 has learned the two youths were eventually located not far from the school; after which, the lockdown was lifted.
It has not yet been confirmed what led the youths to run from the school or what was in the backpack.
NBC 5's Randy McIlwain contributed to this report.