Construction workers found more than 50 suspected World War II-era unexploded shells during excavation at the intersection of Grzybowska and Zelazna streets in central Warsaw on the 13th. Bomb disposal teams attended on the 14th and cleared the ordnance that afternoon; authorities imposed a cordon of roughly 400m, evacuated about 4,000 people from eight nearby buildings and closed the area to pedestrians and vehicles. Two other WWII-era explosive finds were reported in central Warsaw last week.