LA City Hall closed amid hazardous materials investigation

Published August 3, 2026 1:06 PM PDT

Authorities said a hazmat situation is underway at City Hall in downtown Los Angeles after an unknown white substance was found inside the mail room near Mayor Karen Bass' office.

What we know:

The Los Angeles Police Department said the incident was reported at 12:05 p.m. at the building located in the 100 block of Main Street.

LA City Fire added that the substance was found inside a sealed bag. One person was evaluated at the scene and did not require hospitalization after first responders determined they were not exposed. 

What they're saying:

"A suspicious envelope containing an unknown substance was found in a mail room near the Mayor’s office. LAFD and LAPD are investigating. City Hall is closed to the public for the time being," Mayor Bass' said in a statement. 

This is a breaking news story. FOX 11 will provide more updates as they become available. 

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