'Suspicious' fire under investigation at California governor's mansion - Gov. Jerry Brown and his wife, Anne Gust Brown, live in their Oakland Hills home. At the time of the fire, no staff were on the property

A suspicious” fire broke out over the weekend near the governor’s mansion in Sacramento, but investigators are uncertain what sparked the blaze, fire officials said Monday.

About 1 p.m. Sunday, a state park ranger noticed the charred remains of a fire outside the carriage house, a building on the grounds of the Governor’s Mansion State Historic Park, said Cal Fire spokesman Daniel Berlant.

Debris on a metal hand cart -- including sticks, leaves and cardboard -- had ignited, and nearby were exploded canisters of butane and propane, Berlant said. The fire probably covered only a few feet and was extinguished before the ranger discovered the remains.

The fire is believed to have started between 1 a.m. and 1 p.m. Sunday, but the cause remains under investigation by the state fire marshal's office.

"It's definitely an unusual incident," Berlant said. "And that’s what leads it to be suspicious in nature."

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