Police officers patrol at a cordon near Kenton United Synagogue...

Police officers patrol at a cordon near Kenton United Synagogue in Harrow, a suburb of London, Sunday, April 19, 2026. Credit: AP/Jamie Lashmar

LONDON — British police said Monday they arrested two teenagers in connection with an arson attack on a synagogue in northwest London over the weekend, as Jewish leaders express concern about a wave of incidents targeting their community.

Deputy Commissioner Matt Jukes of London’s Metropolitan Police Service said officers arrested two young men, aged 19 and 17, overnight in relation to the attack on the Kenton United Synagogue in the borough of Harrow. The department has made a total of 15 arrests related to six attacks on Jewish targets and a Persian-language media organization critical of Iran's government that occurred over the past few weeks, he said in an interview with the BBC.

One “serious line of inquiry” is that Iran is hiring local criminals to carry out these attacks amid tensions in the Middle East, including the U.S.-Israeli war against the Islamic Republic, Jukes said.

“We’ve seen a pattern with other actors of thugs for hire, people taking cash that looks like quick and easy money,” Jukes said. “This is part of the modern hybrid war fought by proxies.”

In the most recent incident, a bottle containing a flammable liquid was thrown through the window of the Harrow synagogue on Saturday night, causing smoke damage, police said.

Counterterrorism police are investigating the series of incidents, which began on March 23 when an arson attack destroyed four ambulances owned by a Jewish charity that serves people of all faiths in north London. No one has been injured in the incidents.

Prime Minister Keir Starmer's office said he “shares the country’s shock at the recent antisemitic attacks.”

“He stands with the Jewish community and he is determined to do more to give them the security they deserve," his spokesman, Dave Pares, said Monday.

Police on Friday closed Kensington Gardens, a central London park visited by thousands of tourists and local residents every day, after a group that Israel has linked to Iran posted a video claiming Israel’s nearby London embassy was going to be attacked with drones carrying dangerous substances.

Police said the embassy was not attacked, but the force shut the park as officers examined discarded items including two jars containing powder. Police said nothing harmful was found.

Chief Rabbi Ephraim Mirvis said on Sunday that “a sustained campaign of violence and intimidation against the Jewish community of the UK is gathering momentum."

“Thank God, no lives have been lost, but we cannot, and must not, wait for that to change before we understand just how dangerous this moment is for all of our society,” he said on X.

Deputy Assistant Commissioner Vicki Evans said police are aware that a group calling itself Harakat Ashab al-Yamin al-Islamia had claimed responsibility for most of the attacks in Britain. The same group has claimed responsibility for incidents in recent months at places of worship, business and financial institutions across Europe, all of which appear to be linked to Jewish or Israeli interests, she said.

Israel’s government has described Harakat Ashab al-Yamin al-Islamia, whose name means the Islamic Movement of the Companions of the Right, as a recently founded group with suspected links to “an Iranian proxy.”

The U.K. has accused Iran of using criminal proxies to conduct attacks on European soil targeting opposition media outlets and the Jewish community. Britain’s MI5 domestic intelligence service says that more than 20 “potentially lethal” Iran-backed plots were disrupted in the year to October.

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