KUALA LUMPUR, Malaysia (AP) — An initial chemical analysis on 14 Borneo pygmy elephants that died mysteriously could not conclusively determine if they were poisoned, and more tests will be conducted abroad, an official said Friday.

The endangered elephants were found dead last month in a protected forest in Sabah state on Borneo. Sabah is home to most of the remaining 1,200 Borneo pygmy elephants that exist worldwide. The elephants are feared to have been poisoned because they encroached on Malaysian plantations.