Imazas district Mayor Otoniel Danducho says at least 10 people survived yesterday's accident on the Maranon River, a tributary of the Amazon.
Amazonas state spokesman Victor Huaman says the missing include 39-year-old Marco Magnani, his Peruvian wife Cristina Akintui and their 5-year-old son Gabriel.
They live in the Italian city of Verona. Officials earlier said a 2-year old girl and 4-year-old boy were among the missing.
Danducho says a wave apparently overturned the boat.