PORTICELLO, Sicily — Divers searching for six missing people from a superyacht which sank off the coast of Sicily told NBC News Wednesday that debris inside the vessel as well as its depth were making their job difficult. As hopes of finding anyone alive dwindled, the divers said that they had managed to force open one of the Bayesian’s access doors but access to the cabins where people could be trapped was being hampered by detritus. The divers, who were not authorized to speak publicly, added that the depth of the wreck meant they were left with only 10 minutes to search the 184-foot yacht once they reached it.

Then they had to return to the surface, they said. On Wednesday, the dock where they set off from was swarming with vehicles, boats and rescuers. Nearby tourists, reporters and photographers have gathered, eager for news.

Helicopters occasionally fly over the area. British tech tycoon Mike Lynch and five of the 22 other people who were aboard the yacht remain unaccounted for and are believed to be trapped in the Bayesian’s hull, nearly 170 feet underwater. Morgan Stanley International Chairman Jonathan Bloomer and his wife; and Clifford Chance lawyer Chris Morvillo and his wife, are also missing.

Officials confirmed Monday that at least one person, the ship’s cook, had died. Rescuers said Tuesday that there might be people trapped inside the cabins, especially considering the timing of the storm, but that they had so far been unable to check through the ship�.