LONDON — Interpol issued wanted person alerts on Wednesday for two former senior FIFA officials and four corporate executives, one day after Sepp Blatter’s surprising announcement that he would resign as the head of soccer’s governing body.

As broader questions about corruption at FIFA brought renewed scrutiny on the winning World Cup bids of Russia and Qatar, officials from both countries insisted that their right to host the games was not under threat.

Mr. Blatter, who led FIFA for 17 years and was seen as a towering and influential figure in global sports, resigned on Tuesday. The announcement came just four days after he was re-elected as FIFA president, as law enforcement officials in the United States confirmed that he was a subject of the federal corruption investigation that has ensnared the organization.

Mr. Blatter was defiant after winning his fifth term, declaring, “I forgive but I don’t forget,” raising the question of what led to his about-face.