Police are combing through the waters off Australia's east coast Thursday in a search of a couple who are believed to have fallen overboard from a Carnival Cruise ship the night before.
The couple, Australian citizens from New South Wales state, were discovered missing Thursday morning after the Carnival Spirit docked at Sydney's Circular Quay, at the end of a 10-day journey, New South Wales Police Superintendent Mark Hutchings told The Associated Press.
He said surveillance camera footage showed that the couple — a 30-year-old man and a 26-year-old woman whose names have not been released — fell from the ship's mid-deck Wednesday night, when the ship was about 120 kilometers (65 nautical miles) off the coast of Forster, a city 300 kilometers (185 miles) north of Sydney.
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"This is a tragic event at the moment, but we're holding out hope we might be able to find these people alive," Hutchings told the AP.
Investigators were having the video enhanced in a bid to determine whether the couple had jumped or had fallen by accident, Hutchings said.
The ship has around 600 surveillance cameras that are constantly monitored, although no one reported seeing the fall at the time.
No life preservers were missing from the ship, Hutchings said. A missing life preserver might have indicated that one of the missing passengers had attempted a rescue.
Jo Meehan, spokeswoman for the Australian Maritime Safety Authority, which is coordinating the search, said an airplane, a helicopter, and police boats were searching a 1,000-square-kilometer (300-square-nautical mile) area of sea.
The couple and seven of their family and friends were among 2,680 passengers on a South Pacific cruise. The ship's last stop was Mare Island in New Caledonia, which it left on Monday, bound for Sydney. The couple was discovered missing as passengers disembarked, said Peter Taylor, spokesman for the ship's operator, Carnival Cruise Lines.
"The guests in question were traveling with family and friends, and initial reports indicate that the couple was last seen onboard the vessel last night," Taylor said in a statement.
"The ship immediately initiated standard missing person procedures, including a full search of the vessel, as per protocol," he said.
Police said in a statement there were alerted about two hours after the ship docked.
Carnival Cruise Lines is a subsidiary of Miami-based Carnival Corp., the world's largest cruise operator.
Carnival Corp.'s representative in the South Pacific region, Ann Sherry, is chief executive of Carnival Australia, which represents 80 percent of cruise lines in the region.
She told an Australian parliamentary inquiry into cruise ship safety in February that only two passengers had disappeared overboard from cruise ships in the South Pacific since she took her job more than five years earlier.
She said both disappearances had been fully investigated by authorities and there had been no suspicious circumstances in either case.
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Carnival Corp. has been plagued by a series of high-profile problems in recent years. Last year, the Costa Concordia ran aground off the coast of Italy, killing 32 people. Also last year, the Costa Allegra caught fire and lost power in the Indian Ocean, leaving passengers without working toilets, running water or air conditioning for three days. Costa is a division of Carnival Corp.
In February, passengers aboard the Carnival Triumph spent five days without power in the Gulf of Mexico after an engine-room fire disabled the vessel. Those on board complained of squalid conditions, including overflowing toilets and food shortages.
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