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.
Ten elephants showed similar symptoms, including partial paralysis that left them unable to stand before they died within one or two days, Reuters quoted KWS as saying.
The deaths were recorded in Amboseli National Park, Kimana Sanctuary and the Kuku Ranch area.
The condition primarily affected adult females and calves, with only one adult male reported.
KWS said it could not establish the cause of death for five carcasses because they were too decomposed or had been scavenged.
Preliminary analysis by the University of Nairobi detected a potential toxic substance, though further analysis was needed to establish its concentration, significance and source.
Initial tests by the government chemist were negative for the toxins examined, while further testing for other possible toxins was under way.
Authorities are also testing water sources and other potential environmental contaminants to determine whether the elephants were exposed to a common source.
"Importantly, there is no evidence that this incident poses any risk to human health," KWS said, adding that the condition was confined to affected elephants and there was no indication it could be transmitted to people.
