A man has been arrested after Jewish shoppers were reportedly pelted with gas canisters by men in a pick-up truck shouting "Hitler is on the way".
The anti-Semitic incident is alleged to have happened at Tottenham Hale Retail Park, north London, at around 7.45pm on Wednesday.
Jewish neighbourhood watch group Shomrim said they had been contacted by one of the victims who claimed a man in the truck also shouted "Heil Hitler", according to reports.
Scotland Yard said a 24-year-old man had been arrested on suspicion of a religiously aggravated public order offence.
The suspect presented himself to a north London police station and remains in custody, the force said.
Police are still trying to trace the other occupants in the car.
Anyone with information on the incident is asked to call the police on 101 or anonymously on Crimestoppers on 0800 555 111.