Berlin: Andreas Lubitz, the German co-pilot suspected of deliberately crashing a passenger plane into the French Alps, killing himself along with the other 149 people on board, researched methods of committing suicide on the internet the night before the tragic flight, the prosecutor's office of Dusseldorf city announced on Thursday.

The information was extracted from content found on a computer seized by police during a search of Lubitz's home, Efe news agency reported citing the Dusseldorf city prosecutor's office.