Nesta Carter failed drug test, Bolt could lose Olympic gold medal

Jamaican track superstar Usain Bolt may lose one of the three gold medals he won at the 2008 Beijing Olympics after sprint relay teammate Nesta Carter tested positive for a banned substance.

Carter's retested A sample tested positive for the banned stimulant Methylexaneamine.  He reportedly faces a public reprimand or up to an 18-month suspension if the B sample returns a positive test as well.

Carter ran the first leg for Jamaica's winning 4x100m relay team, which posted a then world record time of 37.10 seconds to win gold in Beijing. The other members of the team were Michael Frater, Asafa Powell and Usain Bolt.

The presence of Methylexaneamine has reportedly led athletes to be stripped of their medals in previous cases, meaning that Bolt and the other members of the 4x1 team could also lose their medals.

The International Olympic Committee (IOC) has retested stored samples from London and the 2008 Beijing Games, targeting athletes who could compete in this year's Rio de Janeiro Olympics.The Olympics body reported last week that it had recorded 23 positives from London and 32 from Beijing.

The Russian Olympic Committee said eight of its athletes were among the 23 positives from London identified by the IOC from London. Another 14 Russians were among the 32 caught in Beijing retests, including 10 medalists named by state TV.