UPDATE 4:30 p.m.: Camp Roberts officials have confirmed that about 100 acres of vegetation were burned today at the base, but the fire has been extinguished.
The fire started about 1:40 p.m. and was put out about 3:40 p.m., said Suzi Thomas, the base's spokeswoman.
Thomas said the blaze occurred in the southwestern portion of the massive base property that covers 42,000 acres.
No structures were damaged. Thomas said she didn't know how the fire started.
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"Crews are conducting mop up now," Thomas said. "But the fire is completely under control. It's out."
Original story: A vegetation fire is burning at Camp Roberts this afternoon, though it’s unclear exactly how many acres have been burned.
Cal Fire officials said that the agency has lent Camp Roberts two fire engines and a bulldozer to help fight the fire.
A battalion chief is also at the scene to help advise base officials on how to attack the flames.
Calls to base officials for more information have not yet been returned this afternoon.