A video of the last moments on the doomed Germanwings plane shows passengers cry "My God" just before the plummetting plane clips a mountainside, according to reports.
The "totally blurred and chaotic" footage was reportedly captured from the back of the Airbus A320 and features the sound of three metallic bangs - presumed to be the captain trying to break into the locked cockpit, where co-pilot Andreas Lubitz was at the controls, deliberately bringing the plane down.
All 150 people on board the flight from Barcelona to Dusseldorf, including three Britons, were killed.
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Germany's Bild newspaper and French magazine Paris Match both reported they had viewed the video of the last seconds of flight, which was found on a mobile phone memory card at the crash site in the French Alps.
They said they could not make out any specific individual and it was unclear whether it was filmed by a crew member or a passenger.
Screams of "my God" can be heard in several languages before the cabin is jolted to the side, apparently when the plane clipped a mountainside, according to the reports.
More desperate cries can be heard before the video ends, Bild said.
Frederic Helbert, a journalist with Paris Match who has seen the video, told Radio 4's Today Programme he believed it was genuine.
"The scene was so chaotic that it was hard to identify people, but the sounds of the screaming passengers made it perfectly clear that they were aware of what was about to happen to them," he wrote of the video.
"One can hear cries of 'My God' in several languages. Metallic banging can also be heard more than three times, perhaps of the pilot trying to open the cockpit door with a heavy object.
"Towards the end, after a heavy shake, stronger than the others, the screaming intensifies. Then nothing."
Paris Match reported that the footage was recovered from the debris of the wreckage by a "source close to the investigation".
Lufthansa, Germanwings' parent airline, questioned whether a mobile phone could have withstood the impact.
A spokesman said: "We have also read of reports in a French newspaper about the video. But we have not seen the video and we do not know if it exists. Therefore we cannot confirm if the video is genuine.
"Considering that everything on the plane was destroyed, it would be unusual for a mobile phone to survive the impact."
Reports of the recording came as Lufthansa said it knew six years ago that Lubitz had suffered from a "serious depressive episode".
Earlier, Lufthansa had said that as part of its internal research it found emails which Lubitz sent to the Lufthansa flight school in Bremen when he resumed his training there after an interruption of several months.
In them, he told the school he had suffered a "serious depressive episode", which had since subsided.
The airline said Lubitz subsequently passed all medical checks and that it has provided the documents to prosecutors.
The Britons who died in last Tuesday's crash were Paul Bramley, 28, originally from Hull, Martyn Matthews, 50, from Wolverhampton, and seven-month-old Julian Pracz-Bandres, from Manchester, who died alongside his mother, Marina Bandres Lopez Belio, 37, originally from Spain.
As the task of searching through the wreckage continued, Lufthansa said its insurers were setting aside £203 million to deal with possible costs resulting from the crash.
Last week, the company offered immediate aid of up to £36,000 per passenger to relatives of the victims.
Lufthansa said out of respect for the victims it was cancelling festivities for the 60th anniversary of the airline, which were to have taken place on April 15.
Instead the company will provide a live broadcast for its employees of the official state ceremony in Cologne Cathedral on April 17 which will be attended by bereaved families.
With Lubitz having been treated for suicidal tendencies, France's air accident investigation agency the BEA is examining cockpit entry and psychological screening procedures following the crash.
It also said it would be studying "systemic weaknesses" that could have led to the crash, notably psychological screening procedures and cockpit door procedures.