Update at 4:15 p.m. on 2/11/22 — Arlington police have released more information about the threat. Police say an anonymous caller claimed to be armed with hostages inside one of the Yorktown High School bathroom, in what was later determined to be a false report. From ACPD:
The Arlington County Police Department continues to investigate a telephone threat to Yorktown High School. At approximately 1:26 p.m. on February 10, police were dispatched to the 5200 block of Yorktown Boulevard for the report of a threat. The reporting party advised dispatch that the Main Office had received an anonymous call from the suspect who was alleging to be a student and making threats to ‘shoot up’ the school. The school was placed on lockdown as police responded to investigate the credibility of the threat.