PARIS, April 2. /TASS/. The flight data recorder of Germanwings Airbus A320 that crashed in the French Alps on March 24 will hopefully be useful to investigators, Brice Robin, the prosecutor of Marseilles, said on Thursday.

In all probability, the recorder had been in a blaze, he added.

The flight data recorder was discovered earlier on Thursday and would now be sent to Paris for examination. The cockpit voice recorder was recovered soon after the crash and sent to investigators in Paris.

The plane en route from Barcelona to Dusseldorf crashed in mountainous terrain in the department of Alpes-de-Haute-Provence, southern France. All 150 people onboard, including 144 passengers and six crew, died in the crash.

Forensic experts have used 2,828 samples to identify their DNAs, Brice Robin said adding the remains of the dead would be handed over to the relatives only after all investigative actions had been completed.

Meanwhile, prosecutors in Dusseldorf said that Germanwings co-pilot Andreas Lubitz, who is believed to have deliberately crashed the Airbus, had studied suicide methods on the Internet.

German investigators searched the co-pilot's computer and discovered that he had also researched cockpit door security, prosecutors said.