The assailant was shot by police officers and arrested minutes after he opened fire at people in central Krakow.

Polish Interior Minister Marcin Kierwiski said the suspect in the mass shooting holds very radical and ultranationalistic views.

Poland began two days of national mourning on Sunday and police bolstered security after six people were killed in a mass shooting in Krakow's historic main square that the government said was likely inspired by far-right ideology.

A Polish gunman likely influenced by far-right ideology killed six people in the main square of the southern city of Krakow before police shot and arrested him, officials said on Saturday, adding that three more bodies were found at his home.

The gunman, a 24-year-old Polish citizen, aimed at random people as he drove into the Main Square, a major tourist destination in the center of the city, Krakow police said.