Lufthansa has defended its treatment of families of victims of the Germanwings crash in the French Alps, saying its compensation offer had gone "well beyond" what was required by law.
Relatives of the German citizens killed in the March 24 disaster have turned down the parent company's compensation offer and accused it of ignoring their suffering.
The parents of 16 high school students killed in the crash wrote an open letter to Lufthansa CEO Carsten Spohr to voice "disappointment" at Lufthansa's conduct "since a pilot from your company killed our children".
Prosecutors believe the jet's 27-year-old co-pilot, Andreas Lubitz, deliberately crashed the Airbus A320 into the French Alps, killing everyone on board.
"We understand that relatives are angry and reacting emotionally," Lufthansa spokesman Andreas Bartels told the newspaper Bild.
"We are doing everything we can to ease the relatives' suffering.
"From day one Mr. Spohr has admitted to responsibility for the disaster and apologised for the suffering it has brought on to the families. We would give anything to undo this misfortune."
Lufthansa, the parent company of low-cost carrier Germanwings, disbursed 50,000 euros per victim in immediate aid after the crash.
It said on June 30 that it would additionally offer compensation of 25,000 euros to the families of each of the 72 Germans killed, plus 10,000 euros to each immediate relative, including parents, children and spouses.
The group of 32 parents of students from the town of Haltern wrote that to put this value "on the life of each of our children and on our pain" was deeply offensive.
They are demanding a "six-figure sum", their lawyer said on Saturday, adding in Bild that families had asked for 200,000 euros.
Lufthansa had said it planned to compensate relatives of non-German victims but it was too early to quantify the exact amount in all cases because laws differed in their countries of origin.