Catalan former leader Carles Puigdemont, wanted on a Spanish arrest warrant, has been detained in Germany after entering the country from Denmark, Euronews reports.
He faces up to 25 years arrest for organising an independence referendum in October.
Puigdemont had been in self-imposed exile in Brussels for the last five months before he travelled to Finland on Thursday.
German police said he was arrested by a highway near the Danish border on Sunday.
Puigdemont is one of 25 Catalan politicians the Spanish Supreme Court decided on Friday to try for rebellion, misuse of public funds or disobeying the state.