UPDATE 7 AM:
Fire contained to three acres. Air attack is on hold to assess the situation.
AS OF 5 AM:
Reports from late Sunday night around 11:50 p.m. of a vegetation fire in rural San Luis Obispo near Los Osos.
The blaze has spread from seven to ten acres on Clark Valley Road.
CAL FIRE is currently on-site with numerous team and water tankers. The extent of the fire won't be known till daybreak when an air attack is planned for 7 a.m.
The cause is currently under investigation.