CARIBBEAN SEA -

The U.S. Coast Guard made a major drug bust deep below the surface of the sea.

The crew of the Coast Guard Cutter Mohawk, based in Key West, stopped a drug sub in the Western Caribbean Sea on Sept. 30, the Coast Guard said.

FBI divers found seven tons of cocaine onboard, worth nearly $180 million. This was the second time in two weeks that the crew of the Mohawk stopped a drug sub.

Several people were arrested.

"I am extremely proud we were able to stop millions of dollars of cocaine from reaching the streets of America," said Cmdr. Mark Fedor, Coast Guard Cutter Mohawk's commanding officer. "They are a significant threat to our nation and throughout Central and South America because they can smuggle massive amounts of narcotics, as well as other illicit goods or people, and we will continue to be out here and stand a vigilant watch."

The Coast Guard said the subs are built in the jungles of South America. They are usually less than 100 feet long. They can travel 5,000 miles with four to five crewmembers onboard.