By admin 
ARLINGTON, Va. — Parts of the Pentagon were under lockdown Thursday morning after officials detected what they initially called an air quality issue.
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A shelter-in-place order was issued for the affected area, with multiple floors and corridors inside the Pentagon locked down. There were also evacuations.
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Two sources later said the lockdown and evacuation was due to a false alarm.
There is no word yet on what may have triggered the incident.