The cause of the accident hasn't been determined, Taboada said, adding that the vehicle was "coming from a party in Santa Teresa at which a lot of alcohol was consumed."
Firefighters were placing the recovered bodies on a soccer field above where the crash took place.
Throughout the morning and day, relatives of the victims arrived to identify their loved ones.
Fedia Castro, mayor of the district where Santa Teresa is located, told Canal N television that rural farmers must rely on informal forms of transport, such as this cargo truck, because no public buses exist in the area.
The high-altitude roads of the Peruvian Andes are notorious for bus plunges, with poor farmers comprising many of the victims. Last year, more than 4,000 people were killed in such accidents.
-AP