Swiss authorities are examining development grants made by FIFA around the world as part of their investigation.
Bidding process for the 2018 and 2022 World Cups was criticised by its own investigator.
FIFA's director of communications Walter de Gregorio is to resign after making a joke on television.
Scandal-plagued FIFA postponed the bidding for the right to host the 2026 World Cup.
Sepp Blatter comes across as an amiable character with eccentric ideas about football but he has shown in the past that he possesses a ruthless instinct for survival and extraordinary political nous.
Sepp Blatter's shock resignation as FIFA president should allow people to now focus on events on the pitch .
Almost exactly four years to the day since former FIFA vice-president Jack Warner stood in the lobby of the Baur au Lac hotel and warned FIFA a "football tsunami" was about to hit it, his words have finally came true.
Favourite to win February's FIFA presidential election until the end of last week, Michel Platini is suddenly facing the same doubts and criticism which he has himself cast upon incumbent Sepp Blatter.
Sepp Blatter could still perform a U-turn on his promise to stand down as FIFA president, a former adviser said on Monday, while FIFA did not directly deny the possibility.
The United States Soccer Federation said in a statement on the new charges that its hosting of the 2016 Copa America Centenario tournament would go ahead as planned.
Blatter quits FIFA; under investigation by US prosecutors, FBI.
A European-led boycott of FIFA or the World Cup is unrealistic.
What's in Michel Platini's head at the moment is how to take Sepp Blatter's job, and whether the Swiss can conspire to stop him.
A global group of government anti-money-laundering agencies said that financial institutions have not done enough to police suspicious financial activity by officials at soccer's global governing body FIFA.