A rabbi was left bleeding and lying on the ground in an attack in Stamford Hill in north-east London.
The attack which took place in Europe's largest strictly Orthodox community, happened over Shabbat.
According to the Stamford Hill branch of the security group Shomrim the rabbi, who has since flown to Israel, was attacked by teenagers near Amhurst Park.
The incident took place at around 9:45 p.m. on Friday.
According to reports, the two teenagers allegedly shouted "Kill Jews" and "F*** Jews" while attacking the rabbi.
The attack has been reported to the police.
Anyone with information is being encouraged to call the police on 101 quoting reference number CAD6332/30/11/19, or call Stamford Hill Shomrim on 0300 999 0123.
Writing on Facebook Stamford Hill Rabbi Herschel Gluck, who is president of Shomrim in Stamford Hill said the rabbi had been "beaten up in a totally unprovoked attack."
He said: "For a government that claims to care about antisemitism, this is another in a long sequence of such incidents where there is no credible response or followup."
The rabbi said it was evidence of how seriously "authorities claim to take" antisemitism and made a demand for "action."
