SAN RAFAEL (CBS SF) - Marin Sheriff responded to reports of possible gunfire at the Marin Civic Center in San Rafael, but a backfiring car appears to be responsible for the panic.
The scene around the Frank Lloyd Wright-designed building was chaotic as workers awaited the all clear.
A Sheriffs spokesperson told KCBS the noise was likely a car backfiring in a tunnel area creating a loud echo that set off a panic.
Officers were searched the facility but gave the all-clear after a room-by-room search.
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