The president of the Spanish Football Federation and his son have been held as part of a corruption investigation, judicial sources say, the Associated Press reports.
Angel Maria Villar Llona was arrested on suspicion of embezzling funds, El Pais and Efe news agency reported.
Mr Villar, a former Spain international footballer, has been president of the association since 1988.
His son Gorka was among a number of other people also arrested during a number of raids early on Tuesday.
Spain’s High Court told Reuters that one of its investigating magistrates and anti-corruption prosecutors were leading the probe.
Efe reported that the allegations centred on the falsification of documents and misappropriation of funds, all related to the organising of international football matches.
There has been no comment yet from Mr Villar or his lawyers.
In Villar’s time as president of the federation, Spain’s men’s football team has won two European championships as well as the 2010 World Cup, becoming one of football’s dominant forces.
