Fifteen elephants died in Kenya’s Amboseli ecosystem from June 24 to July 24, with preliminary tests detecting a potential toxic substance in samples from several animals, the Kenya Wildlife Service (KWS) said in a statement late on Tuesday. The broader Amboseli ecosystem spans the national park and surrounding community land in southern Kenya near the Tanzanian border, providing habitat and movement routes for elephants and other wildlife beneath Mount Kilimanjaro. Similar symptoms including partial paralysisTen elephants showed similar symptoms, including partial paralysis that left them unable to stand before they died within one or two days, KWS said. Preliminary analaysis by the University of Nairobi detected a potential toxic substance, though further analysis was needed to establish its concentration, significance and source. Authorities are also testing water sources and other potential environmental contaminants to determine whether the elephants were exposed to a common source.