Brazilian Ramos, China's Chen barred from Games for doping

Brazilian cyclist Kleber Ramos and Chinese swimmer Chen Xinyi were disqualified from the Olympic Games on Thursday for having failed doping tests.

Ramos tested positive for the banned blood booster EPO Cera while Chen took the diuretic hydrochlorothiazide.

Diuretics are outlawed as they can be used as masking agents for other doping products