Metropolitan Police confirmed they were conducting urgent investigations after posting a video on social media.
Officers have identified the vehicle involved and are trying to locate the occupants, police said on Sunday evening.
“We are aware of a video appearing to show anti-Semitic language being shouted from a convoy of cars in the St John’s Wood area this afternoon,” the force said.
“The agents are carrying out urgent investigations to identify those responsible. This type of behavior will not be tolerated. “
There is no place for anti-Semitism in our society. Before Shavuot, I support the Jews of Britain who should not have to endure the kind of shameful racism we have seen today.
– Boris Johnson (@BorisJohnson) May 16, 2021
The prime minister also criticized the mistreatment of Jews ahead of a two-day religious holiday.
“There is no room for anti-Semitism in our society,” Mr Johnson said on Twitter.
“Before Shavuot, I stand with the Jews of Britain who shouldn’t have to endure the kind of shameful racism we have seen today. “
A video posted on social media shows a group of cars decorated with the Palestinian flag arriving at the traffic lights.
As the group of cars arrive in the video, a person with a megaphone appears to be shouting insults.
The events in the images are described as having taken place on Finchley Road, north London.
We are aware of a video appearing to show anti-Semitic language being shouted from a car convoy in the St John’s Wood area this afternoon. Officers are carrying out urgent investigations to identify those responsible. This kind of behavior will not be tolerated.
– Metropolitan police events (@MetPoliceEvents) May 16, 2021
Commenting on the video, Naz Shah of Labor – shadow minister for community cohesion – said: “This is abominable anti-Semitic and misogynistic abuse, they must be found, arrested and charged, they do not represent those who campaign for Palestinian rights. “
The Met Police investigation of the footage comes as violence in Gaza, which saw 181 people killed including 52 children and 31 women.
Communities Secretary Robert Jenrick said, “Whatever your view of the conflict in Israel and Gaza, there is no justification for inciting anti-Jewish or anti-Muslim hatred.
“The incidents of anti-Semitism that we have seen in recent days have been shameful.
“Some of the terms used on this weekend’s marches and in social media posts are intimidating, criminal and racist.
“We must not tolerate this base and shameful hatred in our country. These actions must stop. “
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Labor leader Sir Keir Starmer called the anti-Semitic video “totally disgusting”.
He tweeted: “Anti-Semitism, misogyny and hatred have no place on our streets or in our society. There must be consequences. ”