Drug traffickers, especially from Colombia, have been caught using submarines to transport cocaine into Mexico, and from there into the U.S.

In a high-stakes operation, the Mexican Navy delivered a major blow to the Sinaloa Cartel on January 15. The Navy uncovered ...

A suspected "narco-submarine" capable of smuggling drugs broke in two as a fishing boat was towing it to a port in northwestern Spain on Wednesday, police said.