SAN DIEGO (KGTV) -- A portion of City Hall in Downtown San Diego was evacuated after crews working in the building possibly disturbed asbestos.
According to the city, construction crews working on the lobby possibly disturbed the asbestos around 2 p.m. Thursday.
The city said in a memo that a contractor working on the sprinkler system accidentally dislodged a section of the ceiling, causing it to crash to the ground.
"Immediate action was taken to isolate and contain the material,'' according to the memo.
The substance hasn’t yet been confirmed as asbestos, but hundreds of people were forced to evacuate as a precaution.
Crews plan to conduct air testing Thursday night with the expectation of reopening City Hall Friday morning.
The City Clerk’s office remains open and is working out of a nearby location until Thursday evening so candidates running for office can meet their 5 p.m. deadline.