PALERMO, Italy: British tech tycoon Mike Lynch died of suffocation after running out of oxygen, an investigative source said, citing initial examinations carried out on Saturday after his body was recovered from the family yacht that sank off Sicily’s coast last month. Lynch, his daughter Hannah, 18, an onboard cook and four guests died when the British-flagged superyacht Bayesian sank during a severe and sudden weather event off the port of Porticello, near Palermo, on Aug. 19.