evidence: New Zealand-based dairy giant Fonterra Co-operative Ltd said on Sunday it had withdrawn milk powder under orders from the Sri Lankan authorities for showing traces of the toxic agricultural chemical dicyandiamide (DCD), although it disputed the accuracy of the testing. [...] But Fonterra's chief executive said the product was clean and safe and it was contesting the Sri Lankan results and the ban. "We are definitely fighting it, because we have clear certificates - DCD-free, stamped, when it was exported, when it was imported - all clear," Theo Spierings told Television New Zealand. He said Fonterra's own testing and that of independent bodies had shown the milk powder was safe. Sri Lanka's Ministry of Health, however, said it has solid evidence to prove the presence of DCD. "The tests were done by Industrial Technology Institute (ITI) of Sri Lanka and they have submitted a report on this. That is the evidence we have. We can prove it in the case of a legal battle," a health ministry official said on condition of anonymity.