Television footage showed the man screaming that "Adamowicz is dead" because his former party, Civic Platform, which held power from 2007 to 2015, had purportedly tortured him when he was in prison.
Local media quoted hospital staff as saying Adamowicz's condition was very serious and he was being operated on.
Adamowicz has been mayor of Gdansk since 1998. In the 2018 regional election, he won 65 percent of votes. (Reporting by Anna Koper; Editing by Kevin Liffey)
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