Colombian marines discovered two homemade submarines that were to ship drugs from the country's Pacific Coast.
The two submarines, made of fiberglass, were found in a clandestine shipyard in the swamps around Colombia's largest port, Buenaventura, the navy said in a statement.
One of the vessels was ready for sea and the other was 70 percent completed when discovered.
Marines destroyed the unfinished submarine and sent the other, a 17-meter-long (56-foot-long) craft with the capacity to transport 5 tons, to a nearby naval base.
The navy said the two submarines belonged to Colombia's largest rebel group, the Revolutionary Armed Forces of Colombia.
In August, authorities discovered a makeshift submarine 20 meters (66 feet) long and 5 meters (16 feet) wide, hidden among trees on the country's Caribbean coastline.
Since 2005, the Colombian armed forces have uncovered nine home-built submarines.
"We should use shock therapy to sober up the Americans. In this case, the Americans will speak about the need to resume dialogue. There is no other option"
An attack is under way against the truth-seeking social media practising data democracy. What is unacceptable is that the liars accuse the truthseekers of lying