FRANKFURT AM MAIN, Jan 30 (INP) - German carmakers came under fire Monday following revelations they helped finance experiments that saw humans and monkeys exposed to toxic diesel fumes that have been linked to asthma, lung diseases and heart attacks. The disclosures sparked widespread outrage, led by Chancellor Angela Merkel who strongly condemned the latest controversy to engulf the nation’s powerful but scandal-tainted auto industry "These tests on monkeys or even humans are in no way ethically justified," said Merkel’s spokesman Steffen Seibert. "The indignation felt by many people is completely understandable." Earlier Monday the Sueddeutsche and Stuttgarter Zeitung dailies reported that a research group funded by Volkswagen, Daimler and BMW had measured the effects of inhaling nitrogen oxide gases on 25 healthy human beings at a German university hospital. The revelation came just days after the New York Times wrote that the same organization carried out tests on monkeys in the United States in 2014. According to the NYT article, the researchers locked 10 monkeys into airtight chambers and made them breathe in diesel exhausts from a VW Beetle while watching cartoons. Volkswagen apologized for the animal testing at the weekend, saying the group "distances itself clearly from all forms of animal abuse". Inp/khan