Last month, the Kenya Wildlife Service announced that 15 elephants had died in the Amboseli ecosystem in a span of a month. Preliminary laboratory tests detected cyanide, while postmortem examinations found tomatoes in the animals’ stomachs.

The head of veterinary services at Kenya’s wildlife agency, Dr. Isaac Lekolool, said the elephants had shown signs of “paralysis and difficulty breathing” before they died. Initial tests pointed to cyanide poisoning, although further laboratory tests are being done to determine the concentration of cyanide.

“We are yet to find out where this cyanide came from,” Lekolool said, adding that the elephants had also consumed watermelons. He urged caution over the handling and use of pesticides on farms.

Kimana, which borders Amboseli, is one of Kenya’s most productive agricultural areas, growing tomatoes, onions and French beans that are transported to markets to the capital, Nairobi.

The samples tested for toxic chemicals were obtained from the elephants’ stomach contents and the analysis of blood samples is ongoing, Dr. Lekolool said. He disputed earlier claims that cyanide, which is regulated by the government for use in mining, may have been present in the park due to illegal mining.

Farms have expanded near the park and conflict between people and elephants remains the second leading cause of deaths after poaching, according to Kenya’s National Elephant Plan. Between 2000 and 2020, at least 1,160 elephants died in incidents linked to self-defense or retaliatory killings as communities sought to protect their crops, property and lives, the Plan notes.

But Duncan Juma, communications director of Kenya’s wildlife service, ruled out human-wildlife conflict in the death of the elephants, saying “the community loves these animals.”

The International Fund for Animal Welfare, or IFAW, said the recent suspected cyanide poisoning highlights the urgent need to tackle the underlying causes of human-wildlife conflict.

“As people and elephants increasingly share space, protecting wildlife and safeguarding communities’ livelihoods must go hand in hand,” IFAW wrote in a statement.

IFAW’S East Africa Director Ben Wandago said the reported cyanide poisoning must be “urgently and thoroughly investigated” and recommended that coexistence solutions to protect communities living near the park be implemented.

“This tragedy also underscores the urgent need for the strict control and responsible handling of highly toxic substances to prevent them from entering the natural environment,” he said.

Farmers are doubtful that the cyanide could have originated from commonly used agricultural inputs.