One of the passengers on the Malaysia Airlines flight MH17 shot down over Ukraine was found wearing an oxygen mask, it has emerged.
Dutch Foreign Minister Frans Timmermans made the revelation during a late-night TV interview on Wednesday.
"You know that somebody was discovered wearing an oxygen mask and had time to put it on," he said.
The passenger, an Australian, had the elastic strap of the mask around his neck, said Wim de Bruin, a spokesman for the Dutch National Prosecutor's Office, which is carrying out a criminal investigation into the crash.
It raises the possibility that some passengers knew the plane they were on was doomed.
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Gallery: Impact Marks On MH17 Fuselage
These stills were released by the Dutch Safety Board on September 9, 2014
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They show clearly visible puncture marks scattered across the fuselage of MH17
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On July 17, the Malaysia Airlines flight lost all 298 passengers and crew
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The plane was flying from Amsterdam to Kuala Lumpur
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The disaster occurred over an area of Ukraine controlled by pro-Russian separatists
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Crash investigators say it was probably downed by "a large number of high-energy objects"
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The Dutch Safety Board has ruled out technical fault or human error
After Mr Timmermans made the comments, Dutch prosecutors confirmed it in a letter to the victims' families.
"How and when the mask ended up around the victim's neck is unknown," prosecutors said in the letter, which was published online.
Mr De Bruin said forensic experts investigated the mask "for fingerprints, saliva and DNA and that did not produce any results.
"So it is not known how or when that mask got around the neck of the victim."
He also said he did not know where in the plane the Australian victim was sitting.
None of the other 297 victims of the crash was believed to be wearing an oxygen mask, prosecutors added. Thirty-eight Australian residents and citizens were killed in the disaster
Relatives of the Australian passenger were told about the mask as soon as it was discovered.
But the families of other victims heard about it for the first time when Mr Timmermans mentioned it during the TV interview.
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Gallery: The World Mourns For MH17
Flowers continue to be left outside Schiphol Airport in Amsterdam
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One of KLM's crews pay their respects
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They add a bouquet to the growing number of flowers
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Australian Prime Minister Tony Abbott and his wife Margie attend a memorial at St. Mary's Cathedral in Sydney
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Mourners in Australia attend a memorial service held for a family of five killed in the crash
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Children at the ceremony in Sydney, Australia
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A photo displayed on a memorial shows teacher, Arnold Huizen who died with his wife Yodricunda Theistiasih Titihalawa and their daughter
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School children sit together with candles at the Pelita Bangsa school as they remember their teacher Arnold Huizen in Indonesia
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People light candles during a candle light vigil for the victims of MH17 Kuala Lumpur
Mr Timmermans, the incoming vice-president of the European Commission, later expressed regret for revealing the information.
"The MH17 disaster goes to my heart," he said.
"I should not have made the comment. The last thing I want to do is aggravate the relatives' suffering in any way."
Relatives of victims began calling investigators asking about Mr Timmermans' comments, Mr De Bruin said.
The Malaysia Airlines Boeing 777 was shot down on July 17 while flying over rebel-held territory in eastern Ukraine en route to Kuala Lumpur from Amsterdam.
The findings of an initial report by a Dutch-led team of air crash investigators appear to back up claims that the plane was hit by an anti-aircraft missile.
Kiev and the West have accused Moscow-backed separatists of shooting the down airliner with a surface-to-air BUK missile supplied by Russia.
Moscow denies the charge and has pointed the finger back at Kiev.