Colombian navy seizes 20th "narco sub" of year, this one loaded with 3.3 tons of cocaine

The Colombian navy seized a semi-submersible loaded with 3.3 tons of cocaine on Tuesday, marking the 20th such interception of a so-called "narco sub" this year, officials said in a news release. 

The semi-submersible was intercepted while sailing in South Pacific waters, the Colombian Navy said. The cocaine found inside the vessel "was apparently intended to be sent to the coasts of Central America." There was enough cocaine found on board for about 8,000 doses, with an estimated value of more than $111 million, officials said. 

Three men were also arrested. The suspects have not been identified, but are aged 57, 50, and 33. All three were "transporting the material aboard the illegal device," the navy said. The men "were captured for the crime of trafficking, manufacturing or carrying narcotics," the navy said, and have been "placed at the disposal of" the country's attorney general.