Police have launched a hate crime investigation after a man threw a glass bottle at two Jewish girls while praising Hitler and the Holocaust.
The attacker shouted "Hitler is a good man" and said it was "good he killed the Jews" after approaching the teenagers, aged 15 and 16, outside a house in Hackney, north-east London.
The bottle "narrowly missed" one of the girls before they ran inside to escape, the Metropolitan Police said.
Other Jewish children as young as eight were also playing nearby when the attack took place in Heron Drive at 6.50pm on Sunday.
"This was a terrifying experience for the young victims who were targeted in this unprovoked anti-Semitic attack," said Chaim Hochhauser, a supervisor for north-east London's Shomrim, a Jewish neighbourhood watch group.
He added: "There have been many anti-Semitic incidents in this area recently, and it just seems to be getting worse."
There were 47 reported anti-Semitic hate crimes in Hackney, home to Europe's largest Orthodox Jewish community, in the first six months of this year.