The emergency landing occurred while observing a suspected drug deal along the Tambo River in a jungle area, Andina reported.
Police said the aircraft, which left its base in Peru's Mazamari district, did not go down because of a narco-terrorist attack.
"We ruled [out] that it was an attack, since none of the 18 policemen have gunshot wounds," the official said, adding that the matter was being investigated.
Andina did not report on a possible cause of death for the pilot.
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