The British police said the attack on Wednesday was being treated as terrorism, and they warned of rising antisemitic hate crimes.

Officials are investigating similar attacks across Europe, all claimed by a shadowy Islamist group that may be using low-cost, unsophisticated methods to sow fear in Jewish communities.

The city’s main police force said it was investigating fires that struck four ambulances as an antisemitic hate crime.

The temple said 20 shots were fired at the building but no one was hurt.