WARSAW, Poland (AP) — People in Poland are gathering for solemn vigils to honor a mayor who died Monday after being stabbed at a fundraising event the night before.

Some Poles held candles flickering in glass holders as they gathered in Gdansk, where 53-year-old Pawel Adamowicz recently won re-election to a sixth term as mayor.

There were also vigils in Warsaw and other cities across a nation shocked by the assassination. In the Polish capital, some held a big banner reading “Stop Hate.” Adamowicz was stabbed multiple times by an assailant who stormed the stage at the “Lights to Heaven” fundraiser.

The assailant shouted it was revenge against Poland’s main opposition party, which Adamowicz left in 2015.