The Zimbabwean wildlife authorities have found more carcasses of elephants, bringing the total number to 22.
The elephants died of a suspected bacteria infection according to the authorities.
Most of the dead elephants were young with the oldest aged 18 years.
The authorities suspect that the young elephants may have eaten poisonous vegetation.
They said there had been scarcity of food and the young elephants were unable to reach higher tree branches.