HARARE, Zimbabwe — Fourteen elephants were poisoned by cyanide in Zimbabwe in three separate incidents, two years after poachers killed more than 200 elephants by poisoning, Zimbabwe’s National Parks and Wildlife Management Authority said Tuesday.

Three elephants were killed in Matusadona National Park in the Kariba area in northern Zimbabwe and 11 more pachyderms were found dead in two different spots in Hwange National Park in western Zimbabwe over the past two weeks.

In all cases the elephants were killed by cyanide, according to kidney and liver samples from the dead elephants tested by the Biological Sciences Department, said a parks spokeswoman.