Oleg Bryjak and Maria Radner
Oleg Bryjak and Maria Radner had performed at Barcelona's Gran Teatre del Liceu Gran Teatre del Liceu

Opera singing duo Oleg Bryjak and Maria Radner were among the 150 victims of the Germanwings A320 plane crash, it has emerged.

The stars were jetting back home after a series of performances at Barcelona's Gran Teatre del Liceu, when their plane smashed into the French Alps.

Christoph Meyer, director of the famed Spanish opera house, paid tribute to the talented performers, who had both participated in Siegfried in the roles of Alberich and Erda, admitting that he was "stunned" by the tragedy.

"We have lost a great performer and a great person in Oleg Bryjak," he said.

According to the opera house, Radner, who was an alto and played the role of Erda, had been travelling with her husband and baby.

Bryjak, who was a bass baritone, had performed on opera stages including those in Paris, Zurich, London, Los Angeles, Chicago, Vienna, Berlin, Munich, Sao Paolo and Tokyo.

A statement posted on the Gran Teatre del Liceu's Facebook page read: "Our sincere condolences to family and friends of all the victims."

Fans have also taken to social media to offer their condolences and messages of support to the pair's grieving families.

Investigators are on the hunt for clues from the aircraft that crashed in a remote area of the Alps, killing all 150 people on board including 16 schoolchildren.

"We saw an aircraft that had literally been ripped apart, the bodies are in a state of destruction, there is not one intact piece of wing or fuselage," Bruce Robin, prosecutor for the city of Marseille, told Reuters in Seyne-les-Alpes after flying over the crash zone in a helicopter.

There are believed to be no survivors and it is expected to take days to recover the bodies due to the weather conditions.