The blaze outside the K-8 Clifton Cheder, a religious elementary school on Industrial Avenue, broke out just after noon and went to two alarms within 20 minutes.
PSE&G cut the power as firefighters doused heavy flames on the outside and roof of the two-story brick school building. They had the fire knocked down in an hour.
No injuries were reported.
The building sustained smoke and water damage but none from fire, responders said.
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