A Polish government special commission has reinforced its previous allegations that the 2010 plane crash that killed President Lech Kaczynski and 95 others in Russia was the result of Moscow's assassination plan.

Sirens have gone off in some Polish cities to mark the anniversary of the 2010 presidential plane crash, despite widespread protests that their sound would be unnecessary trauma to scores of refugees from the war in Ukraine.

Anxious about the wellbeing of Ukrainian refugees, city mayors across Poland are refusing the government's instructions to sound air raid sirens as part of memorial observances for a 2010 presidential plane crash.

The prime ministers of Poland, the Czech Republic and Slovenia have traveled by train to Kyiv and met with President Volodymy Zelenskyy in a show of support for Ukraine.

Kalina, 76, said the installation in the museum's fountain relates to John Paul II's efforts in the 1980s to help free Poland from communism, which is symbolized by the red color the water has from a red fabric placed on the fountain's bottom. The sculpture also drew ridicule on social media, with some commenters comparing the life-sized likeness of the canonized pope toting a rock to a cartoon figure. Cattelan's work, which was displayed in Warsaw in 2000, was seen as disrespectful and provoked a huge outcry. Born as Karol Wojtyla in the southern Polish city of Wadowice, John Paul II served as pope from October 1978 until his death in April 2005. Critics say that during his papacy, the church failed to bring priests who sexually abused children to account.