WARSAW, Poland (AP) — Polish police are looking for a man who threw a stone into a synagogue in Gdansk as members of the Jewish community were praying on the Yom Kippur holiday.

Police have released security footage of the incident, which shows a man in a dark shirt walking to the synagogue and throwing a stone into a window.

In a statement, police said the incident Wednesday occurred at 6 p.m. local time (1600 GMT) in the Baltic port city of Gdansk, and appealed to anybody who recognizes the man to contact police.

Gdansk Mayor Pawel Adamowicz said he was "appalled" especially because it took place during the prayers ending Yom Kippur.

He called on residents to gather Thursday evening outside the synagogue in a show of protest.