"It was a very strong earthquake," Jolanta Piatek, spokeswoman for mine operator KGHM, was quoted by the paper as saying.
Pazemes grūdienu rezultātā iegruvušas vairākas šahtas. "Tā bija ļoti spēcīga zemestrīce," atzina raktuvju uzņēmuma KGHM pārstāve Jolanta Pjateka.