Investigators say they have found the second black box from the Germanwings plane that crashed into the French Alps last week.

They are hoping it will unearth more clues about the disaster nine days ago in which 150 people were killed.

The second black box is the plane's data recorder and contains readings for nearly every instrument.

The first voice recorder suggested that co-pilot Andreas Lubitz deliberately flew the Airbus A320 into the mountainside.

In another development, prosecutors in Dusseldorf have said the 27-year-old appears to have researched suicide methods in the week before the disaster.

They say a tablet computer found at his home in the city revealed searches had been made about "ways to commit suicide" and "cockpit doors and their security provisions".

"The browser history wasn't erased, in particular the search terms called up on this device in the period from March 16 to March 23 were able to be retraced," a statement said.

Earlier it was revealed mobile phones have been discovered amongst the debris of flight 4U 9525, which was heading for Dusseldorf from Barcelona.

So far the devices have not produced any further insight as to what happened but it is hoped they will on full examination.

It comes after French magazine Paris-Match and German tabloid Bild said they had seen a video of the final moments of the Airfbus recorded on a mobile phone.

Paris Match, which has not published the video, reported: "The sounds of the screaming passengers made it perfectly clear that they were aware of what was about to happen to them."

Meanwhile, the Germany government has announced it is setting up a task force to examine safety issues such as the cockpit door mechanism and pilots' mental health.

The move follows a meeting between Transport Minister Alexander Dobrindt and the German Aviation Association, which represents airlines.

"We want to look at psychological criteria and procedures. We also want to look at the question - how do we recognise any indication of psychological issues," Mr Dobrindt said.

On Wednesday Lufthansa chief executive Carsten Spohr said it will take a "long time" to fully establish what led to the crash despite "learning more every day about the causes".

The day before French President Francois Hollande said all 150 victims will be identified by the end of the week.

This contradicted an earlier report in Bild that said relatives may have to wait much longer, with no guarantees their loved ones will be found.
The violence with which the Airbus smashed into the French Alps last week has severely hampered the DNA identification process.
To date not a single body has been found intact.