A Prince William County high school was evacuated Tuesday morning for a strange odor.
Administrators ordered the evacuation of Patriot High School at 9:15 a.m.
There were reports of a strong, unidentifiable odor in the school building.
At 10:45 a.m. children were waiting aboard school buses.
Officials were conducting sweeps to determine the odor's source.
UPDATE: At 11:20 a.m., students and staff had returned to the building. No danger was discovered, regular school activities resumed.
Follow NBC Washington to get the latest news, events and entertainment anytime, anywhere: on air, online, and on Facebook // Twitter.
