French Prime Minister Manuel Valls on Friday asked German airline Lufthansa to provide all the details it has regarding Germanwings co-pilot Andreas Lubitz, who is suspected to have intentionally crashed Flight 9525 in the French Alps on Tuesday. Investigators have alleged that Lubitz was instrumental in bringing the plane down.

Valls asked Lufthansa to provide all the information it had "so that we can understand why this pilot got to the point of this horrific" act, the Associated Press reported, citing French network iTele. Valls also said that nothing can be ruled out until a complete investigation is done, according to AP.

Meanwhile, Germanwings said in a statement Friday that it is setting up an assistance center to help relatives of those aboard the plane, which was carrying 144 passengers, including 16 schoolchildren and two teachers from a single school in Germany. The company said in a statement that it would begin briefings on Saturday, and provide “psychological assistance” to families and friends of the victims of Flight 9525.

“The suffering and pain this catastrophe has caused is immeasurable. No words can express it and no amount of consolation is sufficient but we want to be there for visiting family members and friends if our support is desired,” Thomas Winkelmann, spokesman for Germanwings' executive board, said in the statement. The airline also arranged for the loved ones of the victims to be transported to the crash site at Seyne-les-Alpes, where they attended a memorial service.

Investigators are probing if Lubitz, whose flight training was interrupted for six months in 2009 because he was suffering from “psychological problems,” was fit to fly the plane. On Thursday, police officials searched Lubitz’s house in the town of Montabaur, about 40 miles northwest of Frankfurt, where he lived with his parents. Officials also searched his apartment in Dusseldorf, and claimed that significant clues were found there without specifying the nature of the clues.

The Airbus A320 was on its way from Barcelona to Dusseldorf on Tuesday when the crash occurred. Reports have suggested that the plane's captain, Patrick Sondenheimer, was locked out of the cockpit when he went to use the restroom, by Lubitz. Investigators believe that Lubitz denied him entry even as Sondenheimer tried to “smash the door down.”