Chemical analysis by Australian experts showed that the elephants' remains contained high levels of heavy metals such as arsenic, cadmium, iron and chromium, the Tourism, Culture and Environment Minister, Masidi Manjun said adding that the authorities are still trying to track down the culprits.
"These metals are usually found around mining, smelting or waste disposal operations. However, this does not make sense as there is no such activity in the area," Masidi said.
Masidi said the Government had been transparent in handling the matter and was working with various wildlife NGOs for long-term conservation efforts of the elephants.