Israeli soldiers stand on top of their tanks and armoured personnel carriers across from the northern Gaza Strip. Picture: Baz Ratner

Berlin -

Berlin authorities say they have banned pro-Gaza protesters from chanting an anti-Semitic slogan and are investigating a sermon by a radical imam who apparently 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 on 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 after 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. - Sapa-AP