A family on a bank holiday weekend trip to the Kent seaside were pelted with stones by a mob of youths yelling "Jews".
The Stamford Hill parents and their five young children came under attack at Minster beach on the Isle of Sheppey on Sunday afternoon.
It is claimed two boys and three girls aged from 16 to 18 launched the assault just after 4pm, hurling pebbles from the shoreline.
The family were forced to take shelter during the ordeal and call 999 for help.
However, the family claims police refused to come to the scene even though the attackers were still there.
Police insisted on Monday that officers had deemed there was no further risk to the family after the person who dialled 999 left the scene.
The Campaign Against Anti-Semitism branded the handling of the incident "appalling" while local Conservative candidate Tom Tugendhat said the attack was "disgraceful".
The family have since returned to London where they are being supported by the north east London branch of the Shomrim community group.
A spokesman for Kent Police said: "Kent Police was called at 4.10pm on Sunday, 28 May, to a report of an assault at Minster Beach, Isle of Sheppey.
"During the call the informant left the scene and officers deemed there was no further risk.
"As the informant is from outside of the county, police are arranging a suitable time to speak to the informant in due course. No arrests have been made."
Anyone with information about the incident can call Kent Police on 01795 419119 quoting reference 28-0929.