The dead man is identified as 25-year-old Nishant Fozdar Jagdeep and the missing American as 23-year-old Alicia Perrien. Authorities haven't said what towns they were from.
Officials say the accident happened Tuesday in Cuzco province as Peruvian guides took three rafts down the Vilcanota carrying 15 tourists from Canada, United States, Argentina, France, Hungary, Netherlands, New Zealand, Spain and Sweden.
The Cuzco region is home to the Inca citadel of Machu Picchu and also is a favourite destination for adventure sports like rafting.
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