[Ken H]

Three similar incidents over the last couple of years (FR threads):

Submarine with cocaine seized off Costa Rica | Nov 20, 2006

Coast Guard Seizes 2 Tons of Cocaine ~~ intercepted a submarine-like vessel in the Pacific ocean | September 15, 2005

Cocaine-smuggling submarine busted-Colombia | Fri, Mar 25, 2005

[Ken H]

They must have a damn fleet of 'em! Here's another:

Colombia Navy Seizes Sub in Coke Probe | Aug 7, 2007

Colombia's navy seized a 65-foot submarine that likely was used to haul tons of cocaine on part of its journey to the United States, officials said Tuesday."