The inquests into the British tech tycoon, his 18-year-old daughter and two other victims of the yacht sinking have opened.

The bodies of tech tycoon Mike Lynch and his daughter Hannah were among those inside the shipwreck.

Investigators believe their cabin filled with carbon dioxide as the oxygen supply diminished.

Authorities investigate two crew members as well as the captain, according to Italian news agencies.

The BBC's Mark Lowen in Sicily on the rapid chain of events in the middle of the night that left seven dead and is dumbfounding experts.

Authorities now believe a localised, powerful wind known as a downburst may have caused the sinking.

Investigators examining the sinking of a luxury yacht that killed seven people have outlined what they know six days on.

The final body from the Bayesian yacht, believed to be Mike Lynch's daughter Hannah, is recovered.