A Spanish judge is expected to issue the warrant demanding Belgium return Puigdemont, who is wanted for questioning over alleged sedition, rebellion and misuse of public funds in relation to his region's independence drive.
Catalan efforts to make the crisis an international issue have so far failed, and the European Union has been steadfast in its support for Madrid throughout, insisting it is an internal matter for Spain.
"This is a matter entirely for the judicial authorities whose independence we respect fully," Breidthardt said.
Puigdemont's Belgian lawyer Paul Bekaert, who in the past has helped Basque separatists militants challenge Spanish extradition requests, told Flemish television channel VRT yesterday his client would fight efforts to send him to Spain.
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Puigdemont, sacked as regional president a week ago by Madrid after the Catalan parliament issued a declaration of independence, has been in Belgium since Monday and calls the allegations against him politically motivated.
The Catalan independence declaration was roundly spurned across Europe, with Germany, France and Britain rejecting it and EU institutions sticking to their support for the government of Spanish Prime Minister Mariano Rajoy.
The European Commission's powerful chief Jean-Claude Juncker warned after the independence declaration that the 28 -member bloc "doesn't need any more cracks, more splits", saying he didn't want the EU "to consist of 95 member states".
Juncker will be in the Spanish city of Salamanca yesterday to receive an honorary degree.
But the bloc's stance is causing disquiet among some MEPs, who see Madrid's hardline handling of the crisis as running counter to European democratic ideals.
"The silence of the European Institutions remains astounding," Ska Keller and Philippe Lamberts, the heads of the Greens bloc in the European Parliament, said today.
"While the European Commission is right to assert the rule of law as a foundation of the Union, so are fairness, building bridges and democratic principles, which have to be respected in all member states.