Andreas Lubitz, the pilot accused of deliberately crashing a Germanwings flight in the French Alps in March, repeatedly ignored attempts to contact him, French investigators said.
The 27-year-old ignored more than a dozen radio calls from civil and military officials before steering the the plane into the mountainside, killing all 150 people on board on March 24, French air accident investigators said.
A preliminary report into the crash also confirmed that Lubitz had practiced the descent on the outbound flight from Dusseldorf to Barcelona on the same day.
Lubitz is known to have suffered from severe depression in the past and a computer found in his home showed he had used the internet to research ways of committing suicide in the days leading up to the crash.
The Germanwings co-pilot thought to have deliberately caused the French Alps plane disaster "rehearsed" his plan on an earlier flight on the day of the crash, an accident report is expected to reveal.
All 150 people on the Airbus A320, including three Britons, were killed when it crashed while flying from Barcelona to Dusseldorf on March 24.
An interim report from French air accident bureau the BEA will say that Andreas Lubitz practised reducing flight altitude on the outbound flight from Dusseldorf to Barcelona, according to German newspaper Bild.
Bild said the BEA report would talk about a "controlled descent that lasted for minutes and for which there was no aeronautical justification".
Lubitz, who had suffered from severe depression, had used the internet to research ways of committing suicide in the days leading up to the crash.
Up to 2,000 Britons are reportedly stranded at Chambéry Airport near the French Alps due to heavy snowfall.
News agency AFP said at least 15,000 drivers were struggling to get in and out of ski resorts in the region.
While a 27-year-old man is said to have died after his car slide into a ravine in the Belledonne mountain range.
One man, believed to be from Yorkshire tweeted this picture of the scenes at Chambéry airport.
Many people are thought to have been put up in emergency accommodation overnight.
France's Interior Minister Bernard Cazeneuve urged drivers "to exercise the utmost caution" and asked people to delay their trips if possible.
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A 48-year-old man has reportedly been arrested by French police in connection with the investigation into the murder of four people in 2012.
On 5th September 2012, Saad al- Hilli, a British engineer, his wife Iqbal, her mother Suhaila al-Allaf and French cyclist Sylvain Mollier were all killed in the attack on September 5 2012.
French authorities said it had considered a railway track in the French Alps to be safe before two people died when a tourist train was derailed by a falling boulder.
Regional transport official Jean-Yves Petit said that even in winter "the track isn't unusually dangerous".
About 30 people were onboard the train, which was left dangling from a clifftop for hours after the incident.
A train travelling through the French Alps was left dangling for hours after being derailed by a fast-falling boulder.
Two people were killed and nine injured after the so-called Train of the Pines was hit by a boulder just outside the town of Annot.
The mayor of the town Jean Ballester said the rock fell with "an extraordinary force".
French authorities have confirmed that two people were killed and nine were injured after a giant rock derailed a train outside the town of Annot.
Around 30 people were on board the tourist train travelling in the French Alps.
Two rescue helicopters were dispatched to the area to help evacuate the stricken train.
Two people, including a Russian tourist, are reported dead after a train derailed in French Alps, 150 kilometers north of the coastal city of Nice.
Firefighters and medical staff had some difficulties reaching the remote snowy site.
Railways of Provence experts told a local newspaper Nice-Matin a rock falling on the tracks might have caused the accident.
Tourists in the French Alps have been taking in the panoramic views from a glass box perched om the Aiguille du Midi, a 3,842-metre peak, with a 1,000 metre drop below.
The Chamonix Skywalk "step into the void" lets people to take a magnificent, vertigo-inducing view of the mountain landscape around Mont Blanc.
A 16-year-old from Hampshire who died in an Austrian avalanche has been named.
Cameron Bespolka from Winchester died at the resort of Lech Am Arlberg after being buried under the snow.
The schoolboy was one of triplets holidaying in Austria with their father, who suffered serious injuries and was airlifted to hospital.
The brothers and their dad were taking part in a skiiing lesson with an instructor when the snow fell on Tuesday at 1.30pm.