March 23 (UPI) -- Police in London said Monday they were treating the torching of four ambulances belonging to a Jewish community charity overnight as an "anti-Semitic hate crime."

The London Fire Brigade, which deployed six engines and 40 firefighters to the incident in the Golders Green area of north London, said gas cylinders inside the Hatzola Trust ambulances exploded, shattering windows in nearby residential properties.

No one was hurt, but at least 34 people were evacuated, the fire department said.

Footage circulating online showed three people, purported to be the suspects, approaching one of the ambulances before setting it alight.

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