LONDON (AP) – Fifteen months after the Beijing Olympics, Bahraini middle-distance runner Rashid Ramzi was stripped of his 1,500-metre gold medal yesterday and four other athletes were disqualified for doping at the games.

The International Olympic Committee (IOC) took action against the five athletes who tested positive in April in retroactive tests for CERA, an advanced version of the blood-boosting drug EPO.

The Moroccan-born Ramzi was the only gold medalist from Beijing caught using performance-enhancing drugs. He had given Bahrain its first ever Olympic track and field gold medal by winning the 1,500, one of the most prestigious events in the sport.

The IOC also stripped Italian cyclist Davide Rebellin of his silver medal in the Beijing road race, a decision which had been announced Tuesday by the Italian Olympic Committee.

Also disqualified yesterday were German cyclist Stefan Schumacher, Croatian 800-metre runner Vanja Perisic, and Greek race walker Athanasia Tsoumeleka. They did not win medals in Beijing.

All five athletes face possible two-year bans from their international sports federations. In addition, under IOC rules, they are ineligible

for the next Olympics in London in 2012.

The athletes’ samples were collected and tested at the Beijing Games in August 2008. They tested negative at the time, but the IOC reanalysed the samples earlier this year when a fully validated test for CERA became available.

The IOC stores Olympic doping samples for eight years with the option of reanalysing them once new testing methods are developed.

IOC medical commission chairman Arne Ljungqvist said Wednesday’s decision shows the Olympic anti-doping effort is working.

“It is a very good message,” he told The Associated Press. “We do have this type of possibility to go back and make use of the eight-year statute of limitation. This sends a very serious warning to people. Even though you may not be caught at the competition today you may be identified tomorrow. That is a deterrent, for sure.”

Ramzi was the biggest name among the five athletes caught in the retests.

The IOC ordered Bahrain’s national Olympic committee to return his gold medal “as soon as possible” and asked the International Association of Athletics Federations to modify the 1,500 results and consider any further action against Ramzi.

Asbel Kipruto Kiprop of Kenya stands to be upgraded from silver to gold in the 1,500. Nicolas Willis of New Zealand could go from bronze to silver, and fourth-place finisher Mehdi Baala of France would get the bronze.

Ramzi could appeal to the Court of Arbitration for Sport.