9/11 Memorial evacuated as a precaution after non-toxic substance left on plaza

(Courtesy: Diego Shurman )

The 9/11 Memorial was temporarily evacuated on Tuesday after a visitor left an unknown substance, later found to be salt, on the plaza.

Police say that an unidentified man placed the non-toxic substance on the plaza at approximately 5:30 p.m., after which there was a precautionary evacuation for a short time.

According to reports, the individual who left the salt may have been performing some kind of ritual.

The 9/11 Museum was not evacuated during the memorial plaza incident.

Normal operations at the 9/11 Memorial resumed a short time later.
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