CNN – The Coast Guard said it seized more than 12,000 pounds of cocaine from a vessel it stopped earlier this month.
Crew members were alerted by customs and border protection about a so-called drug sub about 300 miles southwest of Panama in the Pacific Ocean.
Drug subs are semi-submersible vessels often used to smuggle drugs.
The Coast Guard stopped the craft and arrested four accused drug smugglers.
Officials say the drugs were worth more than $203 million.