Investigators acting on a tip uncovered a massive stash Monday in the nation's capital, Defense Minister Rodrigo Rivera told reporters.
The bricks of cash were found in homes belonging to Daniel "El Loco" Barrera, the national police said in a statement. Raids over the past month have netted a total of more than $140 million, police said.
Monday's find was part of the "biggest drug-money seizure operation in the country's history," Rivera said.
In March, the U.S. Department of the Treasury said Barrera played a "significant role in international narcotics trafficking," noting in a statement that the Colombian government was offering a $2.5 million reward for his capture.
The statement said Barrera and partner Pedro Oliverio Guerrero Castillo operate primarily in the eastern plains of Colombia, between the capital of Bogota and the Venezuelan border.
U.S. officials allege Barrera has a partnership with the Revolutionary Armed Forces of Colombia, the Marxist guerrilla organization also known as the FARC.