Fédération Equestre Internationale (FEI) President Ingmar De Vos had cause for celebration this week after confirmation that all human and equine samples taken during the Rio 2016 Olympic Games have returned negative.

“Keeping our sport clean is a central part of our daily work at the FEI, but to have back-to-back clean Games in London and Rio is something for any sport to be proud of, especially as we were testing for more substances than ever before,” he said. “And that’s on top of absolutely brilliant equestrian sport in Rio, so we really have something to celebrate.”

A total of 60 equine samples—30% of the 200 competing horses—were tested during the Games. The samples were sent to the FEI’s Central Laboratory in Newmarket, U.K., one of the five FEI Approved Laboratories worldwide, with the final batch of results returned to FEI Headquarters last week.

All individual medalists’ horses were tested, plus all fourth-placed horses. Additionally, at least one horse was tested from medal-winning and fourth-placed teams. Random testing was also carried out, with horses being picked by computerized selection, and there was also targeted testing