El Paso - Parents are being alert that an exercise at Horizon Middle School is only a drill.
The school is engaged in a lockdown/active shooter exercise until noon today.
Law enforcers say this exercise will allow the school and public safety agencies to focus on response plans and procedures in the event of an active shooter on school grounds.
The school district is reminding parents, residents and business owners in the area that this is a controlled exercise.
During the simulation, the sounds of shots fired and sirens from emergency crews may be heard.
Surrounding campuses and facilities will also be placed on lockdown.