A 35-year-old man was injured and another 10 people were evacuated from a building in Krakow, southern Poland, after an explosion on Thursday, DPA reported.
The explosion occurred after the man picked up a package that was left at the door of his apartment. Another 10 residents of the building were evacuated.
Police did not say whether the explosion was related to another incident that occurred last month in Krakow, in which two explosions injured three people.