FRESNO, Calif. (KFSN) -- Authorities discovered three large-scale honey oil labs in East Central Fresno Tuesday.
Teams with Fresno & Clovis Police have had a stretch of maple and pine blocked off for several hours after they discovered what they call "sophisticated labs" and dangerous chemicals.
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Investigators say they found seven 50 gallon barrels of explosive chemicals -- what officials say is enough to take out an entire city block.
They add their joint investigation has been going on for one month-- and add the honey oil labs were a multi-million dollar operation.
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It's unclear what the commercial building was, but the signs in front say it used to be a place of ministry.
One person has been arrested.