The families of passengers killed in the Germanwings crash will take legal action against Lufthansa in the United States after rejecting the carrier’s compensation offer as inadequate, the Bild am Sonntag newspaper reported, citing the families’ lawyer.

A group of parents whose children were killed in the Germanwings plane crash have released a scathing letter to Lufthansa’s chief executive, accusing him of ignoring their needs and feelings and insulting them with his company’s compensation offer.