Baku, March 2, AZERTAC Russian soprano Anna Netrebko announced Tuesday that she was stepping down from the stage "until further notice.""After careful consideration, I have made the extremely difficult decision to withdraw from concerts until further notice," she said in a statement."This is not the right time for me to be performing and making music. I hope my audience will understand this decision," she added, in a reference to the war in Ukraine.Netrebko was originally scheduled to perform on Wednesday evening at Hamburg's Elbe Philharmonic but her concert has been postponed until September 2022.The singer was then due to perform in March La Scala in Milan, and in Zurich after that.