The lab was discovered in a camp in Puerto Lopez, a city in Meta state, a stronghold of the FARC rebel group, Colombia Reports said Monday.
The camp, with 11 tents, was found during a counter-narcotics offensive by the air force and navy.
The lab had the capacity to produce cocaine with a market value of $60 million each month, authorities said.
FARC, or the Revolutionary Armed Forces of Colombia, has been engaged in a civil war with the Colombian government since 1964.
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