Games official confirmed that Weightlifter Olivier Matam Matam and boxers Christian Ndzie Tsoye and Simplice Fotsala have been missing since earlier this week, while weightlifters Arcangeline Fouodji Sonkbou and Petit Minkoumba went missing on Tuesday.
All the missing athletes have competed except Tsoye, who failed to show up for his weigh-in for the 91kg quarterfinal on Tuesday, giving his opponent a walkover victory.
Cameroon team manager Victor Agbor Nso said it was unfortunate for the country and its international image.
“We have officially informed our hierarchy back home: the ministry of sports and the president of the National Olympic Committee of Cameroon.
“We have also laid formal complaint to the Australian police.”
The Queensland Commonwealth Games minister, Kate Jones, said the Australian federal police were “keeping a watching brief on these athletes”.
At the time of filling this report, at least 13 African athletes have vanished from the Commonwealth Games in Australia. Most of them are from Cameroon, Uganda, Sierra Leone, Rwanda and Ghana.
Seven Cameroonian athletes disappeared during the London 2012 Olympics.