Andreas Lubitz, the co-pilot believed to have deliberately crashed Germanwings flight 9525, undertook online research into cockpit doors and suicide methods in the days leading up to the crash, Düsseldorf prosecutors said.

The development came as French prosecutors said the second black box from the plane had been found after a nine-day search. 150 people died in the crash.

In a statement released on Thursday, the German investigators said they had analysed a tablet computer found in the co-pilot’s flat.

Read more at http://www.theguardian.com/world/2015/apr/02/germanwings-crash-second-black-box-found