Belgian investigators have searched offices at the European Parliament in Brussels, in a probe into alleged bribes from World Cup host Qatar.
It was the 20th search carried out in Belgium since Friday and the parliament president, Roberta Metsola, warned MEPs that “democracy is under attack”.
Belgian police have arrested four people, among them European Parliament Vice-President Eva Kaili, a Greek MEP.
Qatar has denied any wrongdoing. MEPs will debate the scandal on Tuesday.
Belgian prosecutors said cash worth about €600,000 was found at the home of one suspect, €150,000 at the flat of an MEP and several hundred thousand euros in a suitcase in a Brussels hotel room. Computers and mobile phones were also taken.