Zimbabwe Parks and Wildlife Management Authority spokesman Tinashe Farawo says rangers discovered the carcasses in Hwange National Park on January 25.
He says their ivory was missing.
The spokesman says poachers are increasingly turning to poison instead of using their noisy rifles as police and park rangers increase joint patrols.
Farawo says poachers also are injecting cyanide into oranges and pumpkins, which are favorites of elephants.
The southern African nation teems with elephants and other wildlife but has battled poachers for years.
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