Catalonia's former leader has been released by a Belgian judge after turning himself in to police in Brussels, according to his lawyer.

Ex-President Carles Puigdemont was granted conditional release by the judge, Puigdemont's lawyer, Paul Bekaert, confirmed. Puigdemont, along with the four former Catalan parliamentarians who had also surrendered, are due in court in the Belgian capital within 15 days.

Puigdemont and the other Catalan officials sought by Spanish authorities turned themselves in to Belgian police on Sunday, officials said.