RIO DE JANEIRO — The federation running the boxing tournament at the Olympics reassigned its executive director on Thursday, a day after a handful of judges were sent home for making questionable rulings in a few bouts.

The decision by the federation — the International Boxing Association, known as AIBA — to remove its executive director, Karim Bouzidi, seemed to be the latest move to stanch criticism of judges who have been accused of making dubious decisions to favor boxers from certain countries.

Michael Conlan, an Irish boxer who lost a quarterfinal fight on Tuesday to a Russian fighter, went so far as to accuse the federation of corruption and suggest that Russia had bribed judges. He also denounced President Vladimir V. Putin of Russia on Twitter.

Conlan, a gold medal winner at the world championships last year, said that the sport’s officials were “paying everybody” and that “they’re known for being cheats, and they’ll always be cheats.”