UPDATE (1:00 p.m.) -- Fire crews have knocked down the residential structure fire, which broke out at a two-story home at 451 Trinidad St. in Morro Bay.
Morro Bay Fire Chief Daniel McCrain said that all occupants of the single-family dwelling were out of the house by the time crews arrived.
Two male occupants were treated for minor injuries from the fire. One was treated at the scene, and another was taken to a local hospital via ambulance. No other residents or crew members were injured.
Three other buildings were exposed to the fire, including one that sustained damage to windows and an exterior wall. The building had smoke and water damage to its interior, which has temporarily displaced two residents.
A fence was damaged on the property behind the fire, and another home received some minor exterior paint damage, fire officials say.
The American Red Cross is assisting the displaced residents of both homes.
Morro Bay Fire Department responded to the fire. They were assisted by CAL FIRE SLO and a CAL FIRE crew from the California Men's Colony.
Officials have not yet determined the cause of the fire.
San Luis Obispo County SLOFIST is assisting Morro Bay Fire Department with the investigation. At 12:25 p.m., personnel were still on scene for the investigation.
Fire crews responded to a structure fire in Morro Bay on Wednesday morning.
CAL FIRE SLO says they received a call about a residential fire on Trinidad St. at about 6:33 a.m.
Responding crews included four engines, a battalion chief and a breathing support. All response teams were either on scene or en route.
Morro Bay Fire Department is handling the incident. KSBY has reached out to the department for additional details.
This is a developing story. We will update it as more information becomes available.