madrid spanish police occupy catalan government communications hub eve ban independence referendum madrid attempt thwart regional authority say saturday tens thousands catalans expect vote ballot legal status block spain constitutional court madrid send thousands police northeastern region stop take place catalan leader carles puigdemont tell reuters friday referendum would go ahead regardless everything prepare 2,000 vote point ballot box vote slip everything people need express opinion puigdemont say saturday catalan government spokesman say least four police officer enter center barcelona control regional government telecommunications expect stay two days follow order catalonia high court friday police prevent electronic vote take place court also instruct google delete application say use spread information vote police spain interior ministry confirm action head catalan regional police order officer evacuate close poll station a.m. sunday vote due open a.m. close rally independence campaign barcelona friday people form slogan referendum democracy large white letter stage front cheer crowd many drape red-and-yellow catalan flag catalans camp poll station order defy court order close spanish police occupy catalan tech hub ban vote