Australia on Monday responded to the Germanwings air disaster but mandating that at least two people stay in cockpits of domestic and international airliners.

Deputy Prime Minister Warren Truss will explain the new security arrangements at a news conference later Monday, his office said. The new arrangements were to take effect immediately.

Previously Australia has allowed a pilot to be alone on the flight deck.

French prosecutors blame co-pilot Andreas Lubitz, 27, for the crash of Flight 9525 that claimed 150 lives in southern France last week.

The cockpit voice recorder has revealed that the pilot had been shut out of the cockpit when the Airbus A320 crashed.