LOS ANGELES (AP) — A 1,700-plant marijuana grow house in Southern California erupted in flames when a living room compost pile ignited.

Los Angeles County sheriff’s investigators say the fire broke out about 11 a.m. Monday in a one-story home in the unincorporated north San Gabriel area.

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Detective David Mertens told the Pasadena Star-News that a man was seen running from the home but there are no arrests.

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Mertens says gangs rent out homes to raise pot and investigators find a couple of similar marijuana grow houses each month.

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