Federal agents seized a tugboat "mother ship" loaded with at least five tons of marijuana and three speedboats that fled at up to 90 mph in a smuggling ploy out of style since the early 1980s, officials said Thursday.

The mother ship carrying the marijuana from Mexico was spotted on radar Wednesday night about 100 miles southwest of Fort Myers on Florida's Gulf Coast, and 14 people had been detained by late Thursday, said Coast Guard Lt. Jeff Karonis.A new Customs Service plane designed for night surveillance was in the area by chance on a shakedown training flight.