A second drugs test on an Irish show jumping horse at the Olympics has proved positive.
Four of the horses who competed in the Olympic show jumping event test positive for banned substances.
Canada's Eric Lamaze wins Olympic gold in the individual show jumping after winning a jump-off against Sweden's Rolf-Goran Bengtsson.
Anky van Grunsven gets the better of rival Isabel Werth to claim gold in the individual dressage, with Britain's Emma Hindle finishing seventh.
The United States win gold in the team show jumping in a jump off with Canada, while Britain finish seventh.
Great Britain's Emma Hindle exceeded her own expectations on Saturday to qualify for the individual dressage grand prix freestyle final on Lancet.
Nick Skelton is confident Britain's show jumping team can achieve medal success in Hong Kong following the first round of individual qualifying.
Germany win Olympic gold in the team dressage for the seventh Games in succession, while Britain come sixth.
Emma Hindle and Lancet guide Great Britain to second place after the first day of the dressage.
GB's Michael Whitaker withdraws from the team show jumping event after his horse Portofino 63 is declared unfit to compete.
Tina Cook wins bronze in the individual eventing in Hong Kong after Britain earlier finished third in the team event.
Australia Olympic eventing team lead after the dressage stage with Britain up to fourth position.
France's hopes of defending their Olympic dressage title appear to be over after Nicolas Touzaint and his horse Galan De Sauvagere are forced to withdraw.
Lizzie Greenwood-Hughes on an early scare for GB's equestrian team in Hong Kong
Dressage rider Laura Bechtolsheimer says she is aiming for a top-five finish at the Beijing Olympics.