Firefighters responded Sunday afternoon to a small vegetation fire in the Santa Ynez River bed near Lompoc, according to the Santa Barbara County Fire Department.
The blaze was reported shortly after 4 p.m. near Highway 246 and Sweeney Road, fire Capt. David Sadecki said.
Three county engines responded to the fire, which was contained to about a quarter-acre, he said.
An investigation indicated the fire began at a homeless encampment, he added.