The International Cycling Union says Brazilian second-tier team Funvic Soul Cycles-Carrefour faces being suspended after two more riders tested positive for doping since July.
The UCI say it provisionally suspended Ramiro Rincon Diaz of Colombia and Joao Marcelo Pereira Gaspar of Brazil.
Both tested positive for the CERA version of blood-boosting hormone EPO during the Tour of Portugal in July.
Team-mate Kleber Ramos of Brazil tested positive for CERA in training before the Olympic road race in Rio de Janeiro in August, says the UCI. He was later disqualified.
The UCI says it will refer the team’s case to its disciplinary commission.
Under UCI rules, Funvic Soul Cycles-Carrefour can be suspended from between 15 days to 12 months.