State security spokesman Roberto Alvarez says the small Air Force helicopter was fumigating opium poppy fields when it crashed near Coatepec in the mountains about 100 kilometres west of the state capital, Chilpancingo.
State police and soldiers responded to the crash site last morning. Alvarez says the cause of the crash is under investigation.
Alvarez says it was not immediately known if anyone else was aboard the helicopter.
The military has been working to eradicate opium poppy fields in Guerrero.
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