US citizens among Sicily superyacht missing as search continues

Some of the 15 people rescued are either recovering or have now left hospital.

LONDON -- Two Americans are among those still missing after a superyacht sank off the coast of Sicily on Monday, ABC News has confirmed.

Christopher and Neda Morvillo are among six people still unaccounted for who were aboard the U.K.-flagged Bayesian vessel which sank during a violent storm.

"We are in shock and deeply saddened by this tragic incident," Clifford Chance said in a statement. "Our thoughts are with our Partner, Christopher Morvillo, and his wife Neda who are among the missing. Our utmost priority is providing support to the family as well as our colleague Ayla Ronald, who together with her partner, thankfully survived the incident. Our thoughts extend to the other passengers and crew and all those affected."

The search resumed Tuesday morning for the six people missing from the Bayesian. Among the bodies that may be trapped inside the vessel are those of Lynch and his 18-year-old daughter Hannah.

Some of the 15 people who were rescued are either still recovering or have now left hospital.

ABC News’ Aicha El Hammar, Helena Skinner, Phoebe Natanson and Joe Simonetti contributed to this report.