High-visibility police patrols will be deployed on the streets of London after footage circulated appearing to show antisemitic abuse being shouted from a convoy of cars in north London, Sadiq Khan has announced.
The London mayor said in a tweet that "hate crimes are inexcusable and have no place in our city" after the posting of a video on social media.
"Londoners can expect to see high visibility police patrols, and the Met Police have been working closely with the Community Security Trust. My team and I will continue to monitor the situation closely," Mr Khan added.
The Metropolitan Police confirmed they are carrying out urgent inquiries into the footage, and officers have already identified the vehicle involved and are trying to locate the occupants.
"We are aware of a video appearing to show antisemitic language being shouted from a convoy of cars in the St John’s Wood area this afternoon," the force said.
"Officers are carrying out urgent enquiries to identify those responsible. This sort of behaviour will not be tolerated."
Prime Minister Boris Johnson has also criticised the apparent abuse of Jewish people ahead of a two-day religious holiday.
"There is no place for antisemitism in our society," Mr Johnson posted on Twitter.
"Ahead of Shavuot, I stand with Britain’s Jews who should not have to endure the type of shameful racism we have seen today."
A video posted on social media shows a group of cars decorated with the Palestinian flag pulling up at traffic lights.
As the group of cars arrive in the video, one person with a megaphone appears to be shouting abuse.
The events in the footage are described as having taken place on north London’s Finchley Road.
Commenting on the video, Labour’s Naz Shah – shadow minister for community cohesion – said: "This is appalling vile antisemitic & misogynistic abuse, they need to be found, arrested and charged, they do not represent those campaigning for the rights of the Palestinians."
The Met Police investigation into the footage comes amid continuing violence in Gaza, which has seen 192 Palestinians killed, including 58 children and 34 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 antisemitism we have seen in recent days have been shameful.
"Some of the language used on marches this weekend and in posts on social media is intimidating, criminal and racist.
"We must not tolerate this vile, shameful hate in our country. These actions must stop."
Labour leader Sir Keir Starmer described the video as "utterly disgusting".
He tweeted: "Antisemitism, misogyny and hate have no place on our streets or in our society. There must be consequences."