U.K. Prime Minister Keir Starmer will chair a meeting of the government’s emergency COBRA committee Wednesday afternoon.

Shomrim, the Jewish neighborhood watch group, said it detained a man running down the north London high street with a knife and “attempting to stab Jewish members of the public,” before police arrived and deployed a taser.

The victims were treated by Hatzola, a Jewish voluntary ambulance service, the group said in a post on X.

Sadiq Khan, London’s mayor, confirmed there had been an arrest following the “appalling attack,” and said the Met have now stepped up “high visibility” patrols in the area.

“London’s Jewish community have been the target of a series of shocking antisemitic attacks. There must be absolutely no place for antisemitism in society,” Khan added.

In the House of Commons, Prime Minister Keir Starmer said the attack is “deeply concerning.”

“We all need to do everything we can to support that investigation and be absolutely clear in our determination to deal with any of these offenses, the like of which we’ve seen too much recently,” he added.