Pawel Adamowicz, the liberal mayor of the Polish city of Gdansk, died on January 14 of his wounds a day after being stabbed on stage at a charity event, Poland's health minister said.
Health minister Lukasz Szumowski told journalists the information had been confirmed by doctors caring for Adamowicz.
Adamowicz, who had been mayor of the Polish port city of Gdansk since 1998, was stabbed on Jan. 13 by a man who burst onto an open-air stage at a national charity event. He was 53 years old.
Adamowicz stood out for his initiatives to encourage migrants to seek refuge in the northern Polish city, and for his support of a protest campaign defending the rule of law in Poland against the ruling party's efforts to increase its control over the judiciary and other bodies.
Adamowicz was one of Poland's longest-serving mayors, holding his position in Gdansk since 1998. In the 2018 regional election, he won 65 percent of votes.