She said the deceased were a 65-year-old man from the southern state of Bavaria and a 35-year-old woman.
Another four Germans were injured when the roof of the fair hall in Chorzow, outside the city of Katowice, collapsed during a racing pigeon show on Saturday.
Polish rescue officials said at midday on Sunday that the toll stood at 66 dead and 141 injured. They said at least six of those killed were foreigners, including Belgian, Czech and Slovakian nationals.