The approximate times at which the developments were reported (Zurich time)
7.18am: Top Fifa officials are arrested on corruption charges in a police operation at the Bauer au Lac hotel in Zurich.
7.28am: US law enforcement officials say the possible indictments to be laid out by US prosecutors include: Widespread corruption in Fifa over the past two decades, involving bids for World Cups as well as marketing and broadcast deals.
7.30am: Swiss authorities confirm that six Fifa officials have been arrested on suspicion of receiving and/or paying millions in bribes. The US Department of Justice (DOJ) says Fifa vice-president Jeffrey Webb has been arrested, as well as Eduardo Li, Julio Rocha, Costas Takkas, Eugenio Figueredo and Jose Maria Marin.
8.06am: A Fifa spokesman tells BBC 5Live: "We are seeking clarity."
8.14am: Fifa spokesman Walter de Gregorio tells the Associated Press: "He (Blatter) is not involved at all."
8.51am: The New York Times reports that 14 people, including Fifa officials and sports marketing executives, have been charged.
10.40am: The office of the Swiss attorney-general announces it is questioning 10 Fifa executives who took part in voting on the 2018 and 2022 World Cup bids.
11.08am: At Fifa's press conference in Zurich, de Gregorio repeats that Fifa's general secretary Jerome Valcke and president Sepp Blatter are not involved. He adds: "Fifa are suffering in these circumstances. It is a difficult moment for us." Fifa's congress will go ahead.
11.41am: A DOJ statement names nine Fifa officials and five "corporate executives" who have been indicted for "racketeering conspiracy and corruption". Four individuals and two companies have already pleaded guilty.
12.13am: The number of arrests in Zurich has increased to seven with Rafael Esquivel, according to the DOJ.
1.56pm: A search is under way in Miami at the Concacaf HQ.