Thugs allegedly hurled "vile" anti-Semitic abuse at Jews as they entered a Synagogue for morning prayer in north London.
Two men allegedly shouted anti-Semitic abuse at pedestrians walking to morning prayer along Stamford Hill, witnesses said.
They then walked into the garden of the Viznitz Synagogue in the road and threatened worshippers, according to bystanders.
Barry Bard, Supervisor at Stamford Hill Shomrim said: "Many Jewish people were targeted with vile anti-Semitic abuse and threats whilst minding their own business on their way to Synagogue for Shabbos morning prayers, this was wholly unacceptable. Unfortunately anti-Semitic attacks in Stamford Hill are all too common.
"Shomrim will continue to support victims and to encourage reporting of these incidents to police."
Scotland Yard confirmed police had been called to the area amid reports of men making anti-Semitic remarks.
A 32-year-old man and a 34-year-old man were arrested on suspicion of a racially aggravated public order offence.
The 32-year-old has been bailed until early April.
No further action will be taken against the 34-year-old, police said.