London, England

The International Olympic Committee (IOC) has disqualified American judoka Nicholas Delpopolo from the 73-kilogram competition after allegedly testing positive for marijuana.

"Immediately after his participation in the event on July 30, Delpopolo provided a urine sample that tested positive for the prohibited substance 11-nor-delta-9-tetrahydrocannabinol-9-carboxylic acid," the IOC Disciplinary Commission said in its report.

The prohibited substance the IOC mentioned is commonly known as marijuana. The IOC Disciplinary Commission was composed of chairman Thomas Bach, Denis Oswald and Frank Fredericks for Delpopolo's case.

The IOC also decided that Delpopolo's 7th-place finish be given to the next judoka in the ranking.

The IOC also withdrew the American judoka's diploma in the above-mentioned event withdrawn and had his Olympic identity and accreditation card cancelled and withdrawn immediately.

"The International Judo Federation is requested to modify the results of the above-mentioned event accordingly and to consider any further action within its own competence," the IOC order stated.

Delpopolo said he unknowingly ate a brownie baked with marijuana before heading for London.

"I apologize to U.S. Olympic Committee, to my teammates, and to my fans, and I am embarrassed by this mistake," Delpopolo said in a statement released by the USOC. "I look forward to representing my country in the future, and will rededicate myself to being the best judo athlete that I can be."

"Any positive test, for any banned substance, comes with the appropriate consequences and we absolutely support the disqualification," the USOC said in a statement.

The IOC anti-doping rules for the 2012 London Olympic Games call for testing to take place from July 16, the date of the opening of the Olympic Village, to August 12 2012.

Within that period, the IOC systematically performs tests before and after events. After each event, the IOC systematically carries out tests on the top five finishers plus two at random. The IOC also performs out-of-competition unannounced tests.