A manhole cover blew off this morning as dozens of area buildings lost power and a school closed.
The underground blast shock the 3100 block of Orthodox street in the Birdesburg section of Philadelphia around 10:45 a.m. sending smoke into the air.
The blast happened in front of Cablenet Services Unlimited. An employee at the company said it sounded like a subway going underground and they he saw the manhole cover come off.
No injuries were reported.
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Nearby Franklin Towne Charter Elementary School on the 4200 block of Richmond Street had to close at 11:30 a.m. because it had no power.
On its website, PECO showed more 1,700 outages in the northern region. PECO said that by 11:35 a.m. all the underground cables were repaired and power was back on in the neighborhood.
Crews remained on the scene to figure out what caused the blast.