Updated

Berlin authorities say they've banned pro-Gaza protesters from chanting an anti-Semitic slogan and are investigating a sermon by a radical imam who called on Muslims to kill Jews.

Since the outbreak of violence between Israel and Gaza, participants at anti-Israel demonstrations across Germany have frequently used anti-Semitic slogans and also called for Jews to be gassed. Jewish groups have expressed shock and disgust about the growing anti-Semitism.

Police spokeswoman Cosima Pauluhn said Tuesday that protesters have been banned from using the rallying cry they've been using until now. She added that Jewish groups and several individuals had pressed charges against the sermon by a radical imam calling on worshippers at Berlin's Al-Nur mosque last week to murder Jews. She said police are investigating the incident.