Former FIFA President Sepp Blatter was back at work at the organization’s headquarters Wednesday, a day after announcing his decision to resign, while Interpol put six people with ties to FIFA on its most wanted list.

Blatter spoke to FIFA staff for about 10 minutes on Wednesday morning, returning to the same auditorium where he delivered his resignation speech a day earlier. Staff described him as being emotional, and said he received a standing ovation.

Elsewhere, Interpol got involved. The international police force, based in Lyon, France, issued an alert for two former FIFA officials and four executives on charges including racketeering and corruption.

Two of the men, former FIFA vice president Jack Warner of Trinidad and Tobago and former executive committee member Nicolas Leoz of Paraguay, have been arrested in their home counties. Warner has since been released and Leoz is under house arrest. The Interpol "red notice" means they risk arrest anywhere they travel.

Others listed were Argentinians Alejandro Burzaco; Hugo Jinkis and his son Mariano, who together are accused of paying more than $100 million in bribes for media and commercial rights to soccer tournaments; and Jose Margulies, a Brazilian broadcast executive.

In South Africa, Sports Minister Fikile Mbalula said the government wanted to "categorically deny" that the country paid any bribes to win the right to host the 2010 tournament.

Mbalula characterized the $10 million as an "above-board payment" to help soccer development in the Caribbean region.

The money, which went into a fund controlled by Warner, is part of the U.S. investigation into soccer corruption. That probe led to the arrest of seven soccer officials in Zurich last week, kicking off the FIFA scandal and eventually leading to Blatter's decision to step down.

Warner and Leoz were among 14 people indicted in the U.S. as part of the federal investigation.

U.S. Attorney General Loretta Lynch, speaking in Latvia on Wednesday at a meeting with EU justice ministers, declined to comment on Blatter's resignation or whether he was himself under investigation.

"It's an open case and so we will now be speaking through the courts," Lynch said.

In a separate probe, Swiss authorities have opened a criminal investigation related to the 2018 and 2022 World Cup bidding contests. Russia won the right to host the 2018 tournament and Qatar was awarded the 2022 World Cup.

The Swiss attorney general's office said Blatter was not under investigation, but said it has opened criminal proceedings against "persons unknown" for money-laundering.

Blatter said Tuesday he would remain president until a new election can be set up, which FIFA said could be sometime between December and March.

Prince Ali Bin Al-Hussein, who lost to Blatter in Friday's election, left open the possibility that he could stand again, and former FIFA vice president Chung Mong-joon said at a news conference in Seoul that he will think about whether to run. UEFA president Michel Platini is considered a likely candidate.

The Associated Press contributed to this report.