California fire investigators appear to be investigating what role, if any, a prestigious Napa Valley winery played in the start of the almost 7,000-acre Pickett fire, which is still threatening hundreds of buildings and dozens of wineries.

A spokesperson for Hundred Acre, a popular Calistoga-based winery, confirmed Friday that company representatives had recently spoken with fire investigators who are trying to figure out what started the region's largest fire this year.

"They are working cooperatively with the investigation into the Pickett fire," said Sam Singer, a spokesperson for One True Vine, a company that includes Hundred Acre wines. The San Francisco Chronicle has described Hundred Acre as a "cult Cabernet" winemaker.

While the cause of the fire remains under investigation, a

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