Spain's Guardia Civil said in a statement today that Villar, his son Gorka Villar, and three other football officials were detained while raids were carried out at the federation headquarters.
Villar is also a senior vice president of FIFA and senior vice president of UEFA.
Police said the other three men who were arrested were Juan Padron, the federation vice president of economic affairs, and the president and the secretary of the regional federation for Tenerife.
Spain's minister of education, culture and sport, Inigo Mendez de Vigo, told national television moments after the raids that "in Spain the laws are enforced, the laws are the same for all, and nobody, nobody is above the law."
UEFA said in a statement it "is aware of the reports regarding Mr Villar Llona. We have no comment to make at this time.
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