Fourteen sports officials indicted over corruption charges at the sport's governing body Fifa on 27 May
Seven of the 14 arrested in Zurich, Switzerland - president Sepp Blatter is not among them
One of those held is Jeffrey Webb - Fifa's vice-president
The corruption case involves alleged bribes worth more than $150m since the early 1990s
US attorney general claims executives accepted bribes to secure the 2010 World Cup in South Africa
Six of the seven suspects held in Zurich are contesting their extradition to the US
Separately, Swiss prosecutors launch a criminal case into the 2018 and 2022 World Cup bids
A news conference with Fifa's Director of Communications, Walter De Gregorio, has begun. You can watch it live here.
Mr De Gregorio tells reporters that Fifa's congress in Zurich will go on as planned on Friday, as will the election of the president.
Image source, Fifa@AdlenGarytweets, external: @BBC_HaveYourSay @FIFA the black hole in the middle of football....the whole game suffers.
The faces of some of the Fifa officials seen detained in Zurich. From left to right they are: Jeffrey Webb, Eduardo Li, Eugenio Figueredo, Jose Maria Marin.
A correspondent for Russia's state-owned Rossiya 24 TV channel has said that Wednesday's arrests are "a US attempt to set a precedent after which they may with a vengeance start demanding that Fifa strip Russia of the right to hold the world championship".
The correspondent adds that "this isn't the first time the US has been using sport as political leverage".
New York Times reporter Matt Apuzzo is one of the journalists who broke the story. He told the BBC more arrests were expected.
"There have been accusations of corruption for a long time in Fifa, but we've never seen anything quite like this. "
Image source, AFPMark from the UK emails: Please let this be end of over 40 years of Fifa mismanagement, back-scratching, bad decisions and treating the fans of the most beautiful game like idiots.
There is no obvious footballing reason to send human beings to play a high intensity sport to a country where the temperatures are often above 40 degrees. Please let this be the beginning of the end of the emotional torture FIFA has put us through. Can we now, for the love of all that is holy and good, have our game back please.
Fifa will hold a news conference in Zurich at 09:00 GMT (11:00 CET).
It said in a tweet, external the event would be streamed live on its official site. You'll also be able to watch it here on the BBC news website.
In a separate development, Swiss prosecutors launched a criminal case into the 2018 and 2022 World Cup bids, won by Russia and Qatar respectively.
In a statement,, external the office of the attorney general of Switzerland said criminal proceedings were opened "against persons unknown on suspicion of criminal mismanagement and of money laundering in connection with the allocation of the 2018 and 2022 Football World Cups".
It added that "electronic data and documents" were seized on Wednesday at Fifa's headquarters in Zurich.
BBC Match of the Day presenter, Gary Linekar
tweets, external: This is extraordinary! FIFA is imploding. The best thing that could possibly happen to the beautiful game.
The story is prompting discussion on the BBC World News Facebook page, external with Noel Shanahan stating: "Qatar should never have been picked for the WC. It has been FIFA's downfall", while Hawar Ameen writes: "It would be interesting to know where allegiances and loyalties of those arrested lie. Either way choosing the day of the vote to arrest members is a little obvious."
The BBC has seen a statement released by the US department of justice, which says a 47-count indictment was unsealed on Wednesday in New York, charging 14 defendants with racketeering, wire fraud and money laundering conspiracies, among other offenses.
It says the defendants include high-ranking officials.
Fifa's incumbent president Sepp Blatter is understood not to be one of those arrested. He is seeking a fifth term as the head of the governing body. His rival for the presidency, Prince Ali Bin Al-Hussein of Jordan, described the development as "a sad day for football".
Image source, APFIFA President Sepp Blatter
A number of officials were seen by BBC reporters being escorted from the hotel by police. They include:
Costa Rica's national football chief Eduardo Li, who was due to join Fifa's executive committee on Friday
Uruguay's Eugenio Figueredo, president of South American football governing body Conmebol
Brazil's Jose Maria Marin, a member of Fifa's club committee. Police were seen carrying his suitcase and some of his possessions in plastic bags
Jeffrey Webb - the head of the confederation for North and Central America and the Caribbean and Fifa's vice-president - has also been named as one of those arrested.
Reporters have been gathering outside the luxury Baur au Lac hotel, where the suspects were detained on Wednesday morning.
Image source, AFPThe corruption case, filed in the US, involves alleged bribes worth about $150m (£97m; €138m) since the early 1990s. The suspects are detained pending extradition to the US, as it is believed the money was transferred via US bank accounts.
Hello and welcome to the BBC's live coverage of the arrests of six football officials at the sport's governing body body Fifa. They were detained over corruption allegations in Zurich, Switzerland.
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