Six football officials have been arrested over corruption charges at governing body Fifa, at a hotel in Zurich, Switzerland.
The suspects, who are said to include a Fifa vice-president, have been detained pending extradition to the US.
It involves alleged bribes worth about $100m (£65m; €92m) over two decades.
Fifa members are gathering in Zurich for their annual meeting on Friday, where incumbent President Sepp Blatter is seeking a fifth term.
However, Mr Blatter is not understood to be one of those arrested.
Prince Ali Bin Al-Hussein of Jordan – Mr Blatter’s rival for the Fifa presidency – described the development as “a sad day for football”, but withheld from commenting further.BBC