Polish authorities arrested the man who hung a banner that read "We will take Lviv back and kill Bandera followers" during a rugby match between Poland and Ukraine, Radio Poland reported.
The prosecutor's office charged a 32-year-old resident of the city of Lublin for incitement of hatred on ethnic grounds.
Now he faces imprisonment of up to two years according to the Polish criminal code.
The provocative banner appeared on the stadium's grandstand last Saturday before the eyes of the town's deputy mayor. Security guards feared to take it down due to the fans' aggressive attitude.
Finally, it was dismantled by five intrepid girls.
Lviv belonged to Poland, later to Austria and returned to Poland after World War I. The city was captured by Nazis at the beginning of World War II and joined Soviet Ukraine after liberation.
Stepan Bandera was a Ukrainian nationalist of World War II whose movement is blamed by Warsaw for multiple atrocities including ethnic cleansing and genocide.
