Superyacht victims died after their cabins filled with carbon dioxide and ran out of oxygen - Italian mediaFour people who died when a superyacht sank off the coast of Sicily, suffocated to death in an air bubble as oxygen ran out, according to Italian media.
Source: Superyacht victims died after their cabins filled with carbon dioxide and ran out of oxygen - Italian media (https://news.sky.com/story/bayesian-superyacht-sinking-banking-boss-and-wife-suffocated-to-death-in-air-bubble-as-oxygen-ran-out-13209849)