LONDON - American judo fighter Nick Delpopolo was expelled from the Olympic Games on Monday after testing positive for marijuana.
Delpopolo reportedly said that he ate marijuana accidentally before arriving in London.
Delpopolo is the first of the 10,500 games athletes to fail an in-competition doping test.
His case is the fifth positive test for a banned substance reported by the IOC since its official London Games testing period began in mid-July.
The other four athletes were caught before competing.