WARSAW: Workers in Warsaw laying a new tram line have uncovered a German bunker dating back to World War II, officials said Thursday. The bunker was discovered in recent days at Plac Zbawiciela, or Savior's Square, a major traffic hub in the Polish capital where tram tracks and the street are undergoing thorough renovation. Wojciech Krajewski, a curator at the Museum of the Polish Army, said it is one of 80 bunkers built by the occupying Nazi German forces in late 1944 as part of their defense against the advancing Soviet army. Some 30 of them are preserved in various parts of Warsaw.