Police divers resumed searching Tuesday for six people believed trapped in the hull of a superyacht that sank in deep seas off Sicily, including a British tech magnate who was celebrating his recent acquittal on fraud charges with the people who had defended him at trial. Civil protection officials said they believed the Bayesian, a 184-foot British-flagged yacht, had been struck by a tornado over the water. The ship had been moored about a half-mile offshore off Porticello near Palermo when a storm rolled and the vessel sank at about 5 a.

m. local time on Monday . Grainy film from closed-circuit cameras from shore, broadcast on the website of the Giornale di Sicilia, showed the majestic, illuminated 246-foot mast of the Bayesian weathering the storm and then disappearing over the course of a minute.

Fifteen of the 22 people aboard survived, including a mother who reported holding her 1-year-old baby over the waves to save her. One body was recovered, identified by officials as the Antiguan-born on-board chef. The rest of the 10-person crew survived, including the captain whom prosecutors reportedly sought to interview.

"It's a great, great tragedy," said Britain's ambassador to Italy, Edward Llewellyn, who visited Porticello on Tuesday. Britain sent four investigators to the scene, given the disaster involved a British-flagged ship and British citizens were among the missing. Fire rescue officials have said the six other passengers will be considered missing until they are lo.