Under the pretext that Western demonstrations required it, the East closed the checkpoint the same day, 'until further notice', a situation that was to last until 22 December 1989. Chausseestraße/Reinickendorfer Straße between Berlin-Wedding and Berlin-Mitte For West Berliners and GDR citizens (by road) Invalidenstraße/Sandkrugbrücke between Tiergarten and Berlin-Mitte For West Berliners and GDR citizens (by road) Checkpoint Charlie/Friedrichstraße between Berlin-Mitte and Berlin-Kreuzberg (opened 1961) For foreigners, diplomats, Allied military personnel and GDR citizens (by road) Heinrich-Heine-Straße/Prinzenstraße between Berlin-Mitte and Berlin-Kreuzberg For citizens of the Federal Republic, GDR citizens and diplomats (by road) This was sometimes referred to as Checkpoint Delta Oberbaumbrücke between Friedrichshain and Berlin-Kreuzberg (opened 1963) For West Berliners and GDR citizens (pedestrians) Sonnenallee between Neukölln and Treptow For West Berliners and GDR citizens (by road)