UPDATE (3:25 p.m.) - County officials say the fire department and public works determined there was no danger to employees or the public and people are being allowed back into the building.
(2:24 p.m.) - San Luis Obispo fire officials and police responded to the San Luis Obispo County Courthouse for reports of smoke in the building.
The call came in at around 1:45 p.m. with reports of smoke being seen in the Law Library.
The entire building was evacuated as smoke alarms were going off and fire officials searched the building.
According to police, there were no active flames reported, and smoke was isolated to the Law Library.
An investigation is underway on what caused the smoke. Police say there may have been an electrical malfunction.
Three fire engines responded to the scene. KSBY reached out to the fire department and is waiting to hear back.