March 25, 2015 01:30 PM

Two Americans were added to the list of victims killed in the Germanwings flight 4U 9525 crash after search efforts resumed Wednesday in the French Alps.

Germanwings executive Thomas Winklemann told reporters in Cologne that the death count now includes two Americans among the 150 killed Tuesday when the Lufthansa Airbus A320 went down in southern France while en route from Barcelona to Düsseldorf.

Officials also raised the estimate of German citizens killed to 75. Although no complete list of passenger information has been released, several countries have already come forward with information about missing flyers.

Two opera singers, Maria Radner, 34, and Oleg Bryjak, 54, were on board, returning from performing in Barcelona, according to reports. On Wednesday morning, flags hung at half-mast outside the opera house where Bryjak and German-born Radner had sung on Saturday.

The Australian government also confirmed the death of a mother, Carol, and her son Greig. According to a statement from Australia’s Foreign Minister, they were “enjoying a few weeks’ holiday together at the start of his European stay, where Greig was to teach English this year.”

French Prime Minister Manuel Valls confirmed that passengers of several additional nationalities – including Moroccan, Australian and Argentinian passengers – are also among the casualties. Media reports suggest as many as 15 different nations may have been touched by the crash.

Authorities also retrieved the flight’s cockpit recorder Tuesday from the crash site, which is located near Barcelonette and spans an estimated 4½ square acres. France’s Bureau of Accident Inquiry announced that it will need 24 hours to evaluate what information can be recovered from the damaged black box.

While survivor families await new updates, citizens in communities near the area are rallying to provide support.

Citizens of La Seyne-Les Alpes, a remote community of 1,500, have volunteered to provide free room and board in the wake of the tragedy.

“Beginning yesterday afternoon and until 10 o’clock, people started volunteering rooms, beds, in their homes, in solidarity with the families,” an employee at the village hall tells PEOPLE.

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