An Airbus operated by Lufthansa's Germanwings budget airline crashed in southern France on Tuesday and all 148 on board were feared dead.
"We do not yet know what has happened to flight 4U 9525. My deepest sympathy goes to the families and friends of our passengers and crew," Lufthansa said on Twitter, citing Spohr.
"If our fears are confirmed, this is a dark day for Lufthansa. We hope to find survivors," it said.

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