The public prosector's office in Catalonia said in a statement e-mailed to journalists on Tuesday that "the illegality of any acts directed towards holding the referendum is beyond all doubt".

Officers must now "urgently" prepare reports and statements on any activities they suspect of being related to the referendum, "urgently" inform the public prosecutor's office of the activities, "immediately" collect evidence of the crimes, and seize materials or instruments being used to prepare referendum materials or organise the vote.

The prosecutor's office said that any public servant or c...