Polish mayor dies of stab wounds after attack: media

The mayor of the Polish port city of Gdansk died on Monday, a day after a knife-wielding assailant stabbed him in the heart in front of hundreds of people at a charity event, local media reported.

"Despite all our efforts, we failed to save him," Doctor Tomasz Stefaniak, director of Gdansk's University hospital said, quoted by the Polish PAP news agency.

Anti-violence rallies are being planned nationwide after Sunday's shock attack on Mayor Pawel Adamowicz.