French prosecutors say the second black box recorder from the Germanwings jet crash in the French Alps has been found.

An official in Marseille Prosecutor Brice Robin's office says he will give a news conference Thursday evening about the discovery.

Based on recordings from the first black box, investigators believe co-pilot Andreas Lubitz intentionally crashed Flight 9525 on March 24.

The second black box is the data recorder and contains readings for nearly every instrument on the aircraft.

Also Thursday, German prosecutors said Lubitz appears to have researched suicide methods and cockpit door security in the days before the plane crashed last week.

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Andreas Lubitz appears to have deliberately crashed Germanwings Flight 4U9525 into the French Alps, killing all 150 people on board. (Foto-Team-Mueller/Reuters)

Duesseldorf prosecutors said Thursday investigators found a tablet computer at Lubitz's apartment. They said they were able to reconstruct searches from March 16 to March 23.

Investigators believe the 27-year-old Lubitz locked his captain out of the A320's cockpit on March 24 and deliberately crashed the plane. All 150 on board died.

Prosecutors' spokesman Ralf Herrenbrueck said in a statement that search terms included medical treatment and suicide methods. On at least one day, the co-pilot looked at search terms involving cockpit doors and their security methods.