The Arlington County Police Department was called to the school at approximately 1 p.m. on Thursday, Feb. 2 to investigate the incident.
The school was placed on lockdown and there is expected to be a continued police presence in the area throughout the day as police investigate.
No injuries were reported as of 1:40 p.m. on Thursday afternoon as the investigation continued.
Police were also called to the building earlier this week to investigate an apparent drug overdose involving a teen who was hospitalized in critical condition.
This is a developing story. Check Daily Voice for updates.
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