The incident occurred at a farm in Meng'a township when the elephants attacked a family of three heading to Jinghong city on a motorbike yesterday, state-run Xinhua news agency reported.
The man survived, while his wife and son died.
Wild Asian elephants are under Class A protection in China, with a population of about 300, mainly scattered in Xishuangbanna and the cities of Pu'er and Lincang in Yunnan.
In recent years, there have been frequent reports of attacks by wild elephants causing casualties and property damage in Yunnan.
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