Five bodies have been found inside the wreck of a luxury yacht that sank in a storm off the Italian island of Sicily, but one person remains missing, according to officials.
Head of Sicily's civil protection agency Salvatore Cocina said that searches would resume on Thursday.
He confirmed that of the five bodies found, only four had been recovered, and the process of bringing the fifth to shore is "ongoing".
The whereabouts of the sixth person is still unknown, Mr Cocina added.
Technology tycoon Mike Lynch and his 18-year-old daughter Hannah were among those unaccounted for after the yacht, named Bayesian, sank at around 5am (4am Irish time) on Monday.
Identities of the recovered bodies - taken to the port of Porticello near Palermo - have not been confirmed by authorities, despite local and international media reporting some had been identified.
Mr Cocina said there will be an investigation into the cause of the disaster in due course, but the priority is finding the missing.
The missing also include Jonathan Bloomer, a non-executive chair of Morgan Stanley International, as well as his wife Judy, Clifford Chance lawyer Chris Morvillo and his wife Neda.
Inspections of the yacht’s internal hull took place on Wednesday morning.
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A team of four inspectors from the UK's Marine Accident Investigation Branch (MAIB) also arrived in Porticello to look at the site of the sinking.
It is understood that the MAIB is investigating what happened because the Bayesian was flying a British flag.
The Italian coastguard said the MAIB is not involved in the search for the missing people and has not been requested to assist.
A helicopter was drafted in to help the operation as divers entered the water with torches attached to their headgear.
Fire crews said they had been accessing the vessel through natural entrances, without making openings.
Remote-controlled underwater vehicles have been used, with naval units and cave divers also taking part in the search, the coastguard said.
The Bayesian was moored around 1km off the coast of Porticello when it sank as the area was hit by a storm.
Vincenzo Zagarola, of the Italian coastguard, previously said the missing tourists were feared dead.
The wreckage of the Bayesian is resting on the seabed off the coast at a depth of 50m.
Fire crews described the operation as "complex", with divers limited to 12-minute underwater shifts.
Of the 22 passengers and crew on board, 15 - including Mr Lynch's wife, Angela Bacares - were rescued after escaping on to a lifeboat.
Survivors have been recuperating at a hotel complex in Porticello, where authorities are gathering witness statements.
A body recovered at the scene of the sinking on Monday was that of Canadian-Antiguan national Recaldo Thomas, who was working on the superyacht, the Italian coastguard told Sky News.
Chair of the Maritime Search and Rescue Council Matthew Schanck, said the Bayesian was the victim of a "high impact" and rare weather event.
"Looking at the extreme weather, if it was a water spout, which it appears to be, it's what I would class as like a black swan event," he said.
"Even outside of the maritime industry, all industries struggle with the black swan events."
He said he was confident the authorities would "get to the bottom" of what caused the shipwreck, thanks to the accounts of survivors, witnesses and examination of the ship, which appears to have remained intact on the seabed.
The ship's captain, James Calfield, 51, told Italian media: "We didn't see it coming."
The boat trip was a celebration of Mr Lynch's acquittal in a court case in the United States.
The businessman, who founded software giant Autonomy in 1996, was cleared in June of carrying out a fraud relating to its $11bn (€9.8bn) sale to US company Hewlett Packard.
The Financial Times reported that Mr Bloomer appeared at the trial as a defence witness for Mr Lynch, while media reports suggest the pair are close friends.
In a separate incident, Mr Lynch’s co-defendant in the fraud case, Stephen Chamberlain, died after being hit by a car while running in England on Saturday.
Additional reporting Reuters, AFP
