 The flow of rocket expertise from West Germany to Egypt damaged the relations between Israel and West Germany, but did not stop the payment of reparations and the covert supply of arms to Israel by West Germany.Israel became increasingly concerned with the program after a disaffected Austrian scientist involved with it approached the Israeli secret service, and claimed the Egyptians were attempting to equip the missile with radioactive waste as well as procuring nuclear warheads.In mid-August, the Mossad managed to obtain a document written by German scientist , detailing certain aspects of Factory 333 – the number of rockets being built (900), and additional, weaker evidence that there were plans to develop chemical, biological and gas-filled warheads for these rockets.